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reddish-brown&#44; or flesh-colored plaque&#46; In its early stages&#44; it can go unnoticed or be confused with a benign lesion&#46; It grows slowly&#44; but with time&#44; it extends both vertically and horizontally and forms protruding nodules on the surface&#44; hence the term <span class="elsevierStyleItalic">protuberans</span>&#46;<a class="elsevierStyleCrossRef" href="#bib0120"><span class="elsevierStyleSup">3</span></a></p><p id="par0010" class="elsevierStylePara elsevierViewall">Microscopically&#44; DFSP has the appearance of a well-differentiated fibrosarcoma&#46; It is formed by a dense proliferation of uniform spindle cells with a large elongated nucleus&#44; minimal pleomorphism&#44; and low mitotic activity&#46;<a class="elsevierStyleCrossRef" href="#bib0125"><span class="elsevierStyleSup">4</span></a> The stroma contains varying amounts of collagen and capillary vessels&#46; One of the main histologic characteristics of DFSP&#44; and one it shares with other fibrohistiocytic tumors&#44; is the presence of irregularly interlaced fascicles of spindle cells forming a storiform pattern&#46;<a class="elsevierStyleCrossRef" href="#bib0130"><span class="elsevierStyleSup">5</span></a> The cells are more tightly packed together in the center part of the tumor than at its edges&#44; which feature finger-like projections consisting of fibrous tracts with few cells that invade the subcutaneous tissue&#44; the muscle fascia&#44; and even the bone&#46;<a class="elsevierStyleCrossRef" href="#bib0135"><span class="elsevierStyleSup">6</span></a> These tentacle-like projections can reach great distances from the center of the tumor&#46; The extent of subclinical disease is therefore highly unpredictable and can be difficult to detect by conventional histology&#44; resulting in high recurrence&#44; even in cases of surgical excision with wide margins&#46;<a class="elsevierStyleCrossRefs" href="#bib0140"><span class="elsevierStyleSup">7&#44;8</span></a> The main histologic feature of DFSP is the pattern of subcutaneous infiltration&#46;<a class="elsevierStyleCrossRef" href="#bib0150"><span class="elsevierStyleSup">9</span></a> DFSP typically invades the subcutaneous tissue through the septa and even the fat lobules&#44; forming the well-known honeycomb pattern or parallel-band pattern&#44; which consists of multiple layers of spindle cells&#44; intermixed with uninvolved layers of fat&#44; oriented parallel to the skin surface&#46; Less frequently&#44; the tumor can infiltrate downwards through the septa&#44; forming a digitiform pattern in the subcutaneous fat and&#47;or a club-like compressive pattern&#46;<a class="elsevierStyleCrossRef" href="#bib0130"><span class="elsevierStyleSup">5</span></a> Several histologic variants have been described within these tumors&#44; albeit with varying frequency&#46; These variants include giant cell fibroblastoma&#44; pigmented DFSP &#40;Bednar tumor&#41;&#44; atrophic DFSP&#44; sclerotic DFSP&#44; myoid DFSP&#44; myxoid DFSP&#44; and fibrosarcomatous DFSP&#46;<a class="elsevierStyleCrossRef" href="#bib0130"><span class="elsevierStyleSup">5</span></a></p><p id="par0015" class="elsevierStylePara elsevierViewall">Complete surgical excision is the treatment of choice for DFSP&#44;<a class="elsevierStyleCrossRef" href="#bib0155"><span class="elsevierStyleSup">10</span></a> but it should be recalled that the eccentric growth of the tumor&#44; via fingerlike projections&#44; means that DFSP is highly asymmetric and can extend far from the center of the tumor&#46; These tentacle-like projections that emerge from the edges of the tumor explain the high rates of local recurrence observed in DFSP&#46;<a class="elsevierStyleCrossRef" href="#bib0130"><span class="elsevierStyleSup">5</span></a> Mohs micrographic surgery &#40;MMS&#41; is the treatment of choice for DFSP&#44; as it provides a complete histologic study of all the surgical margins&#46;<a class="elsevierStyleCrossRef" href="#bib0160"><span class="elsevierStyleSup">11</span></a></p><p id="par0020" class="elsevierStylePara elsevierViewall">The fact that DFSP largely follows a favorable course and has low metastatic potential perhaps explains why no truly rigorous studies have analyzed the prognostic factors associated with this tumor&#46; While mortality is generally low in DFSP&#44; morbidity can be high in more aggressive tumors or in tumors located in areas where complete surgical excision is difficult&#46; The most challenging tumors from a surgical perspective are large tumors&#44; long-standing tumors&#44; deep-seated infiltrative tumors&#44; and tumors located in the head and neck region&#46; The only histologic factor associated to date with increased local aggressiveness&#44; however&#44; is the presence of fibrosarcomatous areas&#46;<a class="elsevierStyleCrossRef" href="#bib0165"><span class="elsevierStyleSup">12</span></a></p><p id="par0025" class="elsevierStylePara elsevierViewall">The main aim of this study was to determine which histologic factors are associated with greater subclinical extension and greater local aggressiveness in DFSP&#46; Our secondary aims were to determine the depth of invasion in a large series of DFSP to quantify local aggressiveness and to perform a descriptive study of the histologic characteristics of this skin tumor&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Material and Methods</span><p id="par0030" class="elsevierStylePara elsevierViewall">We performed a retrospective observational study of DFSP cases seen at our department over a period of 13 years &#40;1998-2011&#41;&#46; Only cases with histologic slides representative of the tumor or with paraffin-embedded specimens containing sufficient tumor tissue for creating and staining new slides were included&#46;</p><p id="par0035" class="elsevierStylePara elsevierViewall">We evaluated the following histologic data&#58;<ul class="elsevierStyleList" id="lis0005"><li class="elsevierStyleListItem" id="lsti0005"><span class="elsevierStyleLabel">-</span><p id="par0040" class="elsevierStylePara elsevierViewall">Predominant histologic pattern<ul class="elsevierStyleList" id="lis0010"><li class="elsevierStyleListItem" id="lsti0010"><span class="elsevierStyleLabel">1&#46;</span><p id="par0045" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Storiform pattern&#58;</span> fascicles of dense cells with a whorled&#44; wave-like arrangement</p></li><li class="elsevierStyleListItem" id="lsti0015"><span class="elsevierStyleLabel">2&#46;</span><p id="par0050" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Cartwheel pattern&#58;</span> fascicles of cells radiating from a central axis</p></li><li class="elsevierStyleListItem" id="lsti0020"><span class="elsevierStyleLabel">3&#46;</span><p id="par0055" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Sheetlike pattern&#58;</span> uniformly arranged cells forming neither clusters nor fascicles</p></li><li class="elsevierStyleListItem" id="lsti0025"><span class="elsevierStyleLabel">4&#46;</span><p id="par0060" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Fascicular pattern&#58;</span> cells arranged in fascicles along a long central axis&#44; similar to a herringbone</p></li></ul></p></li><li class="elsevierStyleListItem" id="lsti0030"><span class="elsevierStyleLabel">-</span><p id="par0065" class="elsevierStylePara elsevierViewall">Pattern of subcutaneous tissue infiltration<ul class="elsevierStyleList" id="lis0015"><li class="elsevierStyleListItem" id="lsti0035"><span class="elsevierStyleLabel">1&#46;</span><p id="par0070" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Honeycomb pattern&#58;</span> cells distributed among the septa and fat lobules&#44; forming a honeycomb or lacelike pattern</p></li><li class="elsevierStyleListItem" id="lsti0040"><span class="elsevierStyleLabel">2&#46;</span><p id="par0075" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Digitiform&#58;</span> cells distributed vertically or radially through the septa</p></li><li class="elsevierStyleListItem" id="lsti0045"><span class="elsevierStyleLabel">3&#46;</span><p id="par0080" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Parallel-band pattern&#58;</span> cells arranged predominantly in multiple layers parallel to the skin surface</p></li><li class="elsevierStyleListItem" id="lsti0050"><span class="elsevierStyleLabel">4&#46;</span><p id="par0085" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Compressive pattern&#58;</span> cells arranged in a well-delimited&#44; club-like pattern</p></li></ul></p></li><li class="elsevierStyleListItem" id="lsti0055"><span class="elsevierStyleLabel">-</span><p id="par0090" class="elsevierStylePara elsevierViewall">Cell density&#58; number of cells in a representative area of the tumor measuring 2000<span class="elsevierStyleHsp" style=""></span>&#956;m<span class="elsevierStyleSup">2</span> at &#215;40 magnification<ul class="elsevierStyleList" id="lis0020"><li class="elsevierStyleListItem" id="lsti0060"><span class="elsevierStyleLabel">-</span><p id="par0095" class="elsevierStylePara elsevierViewall">Moderate&#58; &#60;<span class="elsevierStyleHsp" style=""></span>100 cells</p></li><li class="elsevierStyleListItem" id="lsti0065"><span class="elsevierStyleLabel">-</span><p id="par0100" class="elsevierStylePara elsevierViewall">High&#58; 100-150 cells</p></li><li class="elsevierStyleListItem" id="lsti0070"><span class="elsevierStyleLabel">-</span><p id="par0105" class="elsevierStylePara elsevierViewall">Very high&#58; &#62;<span class="elsevierStyleHsp" style=""></span>150 cells</p></li></ul></p></li><li class="elsevierStyleListItem" id="lsti0075"><span class="elsevierStyleLabel">-</span><p id="par0110" class="elsevierStylePara elsevierViewall">Predominant cell type&#58; epithelioid or spindle</p></li><li class="elsevierStyleListItem" id="lsti0080"><span class="elsevierStyleLabel">-</span><p id="par0115" class="elsevierStylePara elsevierViewall">Degree of cellular pleomorphism&#58; none&#44; minimal&#44; moderate&#44; or high</p></li><li class="elsevierStyleListItem" id="lsti0085"><span class="elsevierStyleLabel">-</span><p id="par0120" class="elsevierStylePara elsevierViewall">Number of mitotic fields per 10 fields of view at x40 magnification</p></li><li class="elsevierStyleListItem" id="lsti0090"><span class="elsevierStyleLabel">-</span><p id="par0125" class="elsevierStylePara elsevierViewall">Presence of areas of fibrosarcoma&#58; &#62;<span class="elsevierStyleHsp" style=""></span>5&#37; of the tumor surface with cells arranged in fascicles along a longitudinal axis &#40;herringbone pattern&#41; or &#62;<span class="elsevierStyleHsp" style=""></span>5&#37; highly pleomorphic cells with many mitotic figures&#44; with no specific arrangement</p></li><li class="elsevierStyleListItem" id="lsti0095"><span class="elsevierStyleLabel">-</span><p id="par0130" class="elsevierStylePara elsevierViewall">Presence of other histologic variants of DFSP&#58; pigmented &#40;Bednar tumor&#41;&#44; giant cell fibroblastoma&#44; myxoid&#44; myoid&#44; or sclerotic</p></li><li class="elsevierStyleListItem" id="lsti0100"><span class="elsevierStyleLabel">-</span><p id="par0135" class="elsevierStylePara elsevierViewall">Deep histologic invasion &#40;deepest involved layer&#41;&#58; subcutaneous tissue&#44; muscle fascia&#44; muscle&#44; periosteum&#44; or bone</p></li></ul></p><p id="par0140" class="elsevierStylePara elsevierViewall">The modified MMS technique&#44; known as <span class="elsevierStyleItalic">slow Mohs</span>&#44;<a class="elsevierStyleCrossRef" href="#bib0170"><span class="elsevierStyleSup">13</span></a> was used to treat all the tumors included in this study&#46; To determine the exact depth of invasion&#44; serial sections were obtained from the debulking specimen&#8212;or from the scar tissue of excised tumors with positive margins&#8212;and stained with hematoxylin and eosin&#46; In several cases&#44; multiple serial slices were examined to identify or rule out the presence of tumor foci&#46;</p><p id="par0145" class="elsevierStylePara elsevierViewall">Local aggressiveness was defined as involvement of the muscle fascia &#40;or the galea aponeurotica in tumors of the scalp&#41;&#46; We analyzed the association between the presence or absence of local aggressiveness and each of histologic features evaluated&#46; For this part of the study&#44; we included only primary tumors to ensure a more faithful reproduction of our results in future studies&#44; as there is a greater risk of including a poorly representative part of the tumor in recurrent tumors or excised tumors with histologically positive margins&#46;</p><p id="par0150" class="elsevierStylePara elsevierViewall">SPSS was used for statistical analyses&#46; The distribution of independent variables in relation to the dependent variable &#40;invasion of the fascia or galea aponeurotica&#41; was evaluated using the Pearson &#967;<span class="elsevierStyleSup">2</span> test or the Fisher exact test for expected values of under 5&#37;&#46; Statistical significance was set at a level of <span class="elsevierStyleItalic">P</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">&#60;</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">&#46;05&#46;</span></p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Results</span><p id="par0155" class="elsevierStylePara elsevierViewall">We included 155 cases of DFSP in which it was possible to determine the depth of invasion&#46; Of these&#44; 103 had sufficient tumor material for the histologic study&#59; 73 were primary tumors&#44; 22 were recurrent tumors&#44; and 8 were tumors that had been removed with positive margins&#46; The results of the histologic study are shown in <a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#46;</p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><p id="par0160" class="elsevierStylePara elsevierViewall">The predominant histologic pattern was the storiform pattern &#40;67&#46;9&#37; of cases&#41;&#44; while the predominant subcutaneous infiltration pattern was the honeycomb pattern &#40;46&#46;6&#37;&#41; followed by the digitiform pattern &#40;27&#46;1&#37;&#41; &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0165" class="elsevierStylePara elsevierViewall">Cell density was moderate in over half of the cases &#40;55&#46;3&#37;&#41;&#44; and the predominant cell type was spindle &#40;92&#46;2&#37;&#41;&#46; Of note were the low degree of pleomorphism observed &#40;none in 4&#46;8&#37; of cases and minimal in 58&#46;2&#37;&#41; and the small number of mitotic figures &#40;mean of 1&#46;8 and median of 1&#41;&#46; The following histologic variants were identified&#58; areas of fibrosarcoma &#40;14 cases&#44; 13&#46;6&#37;&#41;&#44; sclerotic DFSP &#40;16 cases&#44; 15&#46;5&#37;&#41;&#44; myxoid DFSP &#40;10 cases&#44; 9&#46;7&#37;&#41;&#44; pigmented DFSP &#40;7 cases&#44; 6&#46;7&#37;&#41;&#44; and giant cell fibroblastoma &#40;1 case&#41; &#40;<a class="elsevierStyleCrossRef" href="#fig0010">Fig&#46; 2</a>&#41;&#46;</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia><p id="par0170" class="elsevierStylePara elsevierViewall">In most cases &#40;62&#46;6&#37;&#41;&#44; the tumor did not extend beyond the subcutaneous tissue&#59; there was involvement of the fascia or galea aponeurotica in 17 cases &#40;11&#37;&#41; and of the muscle tissue in 36 cases &#40;23&#46;2&#37;&#41;&#46; The periosteum was affected in just 5 cases &#40;3&#46;2&#37;&#41;&#46;</p><p id="par0175" class="elsevierStylePara elsevierViewall">Regarding the association between depth of invasion and the different histologic features analyzed &#40;<a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a>&#41;&#44; we observed a high degree of cellular pleomorphism in the sheetlike and cartwheel patterns and a significant association between the presence of more than 1 mitotic figure and involvement of the muscle fascia or galea aponeurotica&#46; None of the other histologic features were significantly associated with local aggressiveness&#46;</p><elsevierMultimedia ident="tbl0010"></elsevierMultimedia></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">Discussion</span><p id="par0180" class="elsevierStylePara elsevierViewall">Histologically&#44; DFSP typically consists of a dense proliferation of spindle cells with scant cytoplasm that form a storiform pattern&#44; have a uniform appearance&#44; and exhibit minimal pleomorphism&#46;<a class="elsevierStyleCrossRef" href="#bib0110"><span class="elsevierStyleSup">1</span></a> Our findings are consistent with this pattern&#46; Of potential interest in our series is the moderate cell density observed in the majority of tumors&#46; This may partly be explained by the fact that we defined moderate cell density as fewer than 100 cells in a representative section of the tumor viewed at &#215;40 magnification&#46; In addition&#44; in most cases the surface of the tumor occupied by tumor cells was larger than that occupied by collagenous stroma&#46;</p><p id="par0185" class="elsevierStylePara elsevierViewall">The arrangement of cells in short&#44; interlacing fascicles&#44; forming the storiform pattern&#44; is typical of fibrohistiocytic tumors and particularly specific to DFSP&#46; Although this pattern is common&#44; other patterns&#44; such as the cartwheel&#44; sheetlike&#44; and fascicular patterns&#44; are occasionally seen&#44; with varying predominance&#46; This was the case in our series&#44; in which the storiform pattern was the most common pattern observed &#40;67&#46;9&#37; of cases&#41;&#44; followed by the sheetlike pattern &#40;14&#46;5&#37;&#41; and the cartwheel pattern &#40;12&#46;6&#37;&#41;&#46; The cartwheel pattern may simply be a variant of the storiform pattern with particularly short fascicles&#46;</p><p id="par0190" class="elsevierStylePara elsevierViewall">The manner in which the tumor infiltrates the subcutaneous tissue is an extremely important histologic feature of DFSP and is frequently of diagnostic value&#46; While the honeycomb pattern is the best-known pattern in DFSP&#44; the parallel-band pattern has been found to be more common in certain series&#46;<a class="elsevierStyleCrossRef" href="#bib0150"><span class="elsevierStyleSup">9</span></a> In our case&#44; the predominant pattern was the honeycomb pattern &#40;46&#46;6&#37;&#41;&#44; followed by the digitiform pattern &#40;27&#46;1&#37;&#41;&#44; the compressive pattern &#40;14&#46;5&#37;&#41;&#44; and the parallel-band pattern &#40;11&#46;6&#37;&#41;&#46; The honeycomb pattern&#44; which is an important diagnostic clue&#44; was actually observed in the majority of tumors&#44; even though it was not the predominant pattern&#46; Nonetheless&#44; it should be noted that identification of subcutaneous infiltration patterns is prone to subjective interpretation and it is therefore difficult to establish the frequency of one pattern or another with certainty&#46; The parallel-band pattern has been associated with a shorter disease course in DFSP&#44; while the honeycomb pattern has been associated with advanced disease and is actually considered to be representative of the final stage of tumor growth&#46; We did not specifically study the association between disease course and subcutaneous patterns in our series&#44; but as noted in the section below on factors associated with local aggressiveness&#44; we did not find a significant association between subcutaneous infiltration patterns and a greater frequency of fascia involvement&#46;</p><p id="par0195" class="elsevierStylePara elsevierViewall">Fibrosarcomatous areas may be observed in between 7&#37; and 20&#46;9&#37; of DFPS cases&#46;<a class="elsevierStyleCrossRefs" href="#bib0175"><span class="elsevierStyleSup">14&#8211;16</span></a> The prevalence in our series&#8212;13&#46;6&#37;&#8212;is consistent with these figures&#46; The prognostic implications of fibrosarcomatous areas in DFSP in relation to our findings and reports in the literature are discussed below&#46; Other histologic variants or areas of degeneration are rare in DFSP&#44; as reflected by reports in the literature and our findings&#46; It is difficult to establish the frequency of these histologic subtypes&#59; the most common ones in our series were sclerotic areas &#40;15&#46;5&#37;&#41;&#44; myxoid areas &#40;9&#46;7&#37;&#44; and pigmented areas &#40;6&#46;7&#37;&#41;&#46; Giant cell fibroblastoma was particularly rare in our series&#44; and was observed in just 1 adult&#46; In the largest series of giant cell fibroblastoma to date&#44; 11&#46;6&#37; of cases were observed in adults over 40 years old&#44; which is consistent with our finding&#46;</p><p id="par0200" class="elsevierStylePara elsevierViewall">The number of mitotic fields tends to be low in DFSP&#46;<a class="elsevierStyleCrossRef" href="#bib0110"><span class="elsevierStyleSup">1</span></a> In our series&#44; the mean number of figures observed in 10 fields of view at &#215;40 magnification was 1&#46;8&#44; which is also consistent with figures in the literature&#46; The largest number of figures was found in tumors with a fibrosarcomatous component&#44; which&#44; as we will discuss later&#44; might have a role in the locally aggressive nature of certain tumors&#46;</p><p id="par0205" class="elsevierStylePara elsevierViewall">Regarding histologic depth of invasion&#44; DFSP tumors infiltrate the fascia or muscle in 0&#37; to 24&#46;6&#37; of cases&#44; depending on the series&#46;<a class="elsevierStyleCrossRefs" href="#bib0190"><span class="elsevierStyleSup">17&#8211;19</span></a> Of the 155 cases analyzed in our series&#44; the tumor had invaded the subcutaneous tissue in 63&#46;8&#37; of cases&#44; the muscle fascia in 7&#46;1&#37; of cases&#44; the muscle in 22&#46;5&#37; of cases&#44; and the periosteum in 3&#46;2&#37; of cases&#46; The rate of deep invasion observed &#40;29&#46;6&#37;&#41; is slightly higher than that generally reported&#46; Although DFSP is associated with a favorable prognosis&#44; it should be recalled that most cases involving muscle invasion constitute a locally aggressive sarcoma&#44; which has implications for surgical treatment and postsurgical complications and sequelae&#46; Because this form of deep invasion tends to be focal rather than diffuse&#44; the treatment of choice is MMS&#44; as it enables a complete study of the deep margin and spares healthy tissue&#59; this sparing of healthy muscle tissue has important implications in terms of surgical complications and sequelae&#46;</p><p id="par0210" class="elsevierStylePara elsevierViewall">In our series&#44; 3 histologic features were significantly associated with invasion of the muscle fascia or the galea aponeurotica&#58; histologic pattern&#44; cellular pleomorphism&#44; and number of mitotic figures&#46;</p><p id="par0215" class="elsevierStylePara elsevierViewall">In the first case&#44; both the sheetlike and cartwheel patterns were significantly associated with infiltration of the fascia or galea aponeurotica&#44; indicating that particular attention should be paid to tumors with a predominance of either of these patterns&#46; The general lack of cases with a predominant sheetlike pattern&#44; however&#44; probably indicates that our results were a chance finding&#46; The most common histologic pattern observed in DFSP is the storiform pattern&#44; and in our series&#44; this pattern was present in an almost identical proportion of tumors with deep &#40;fascial&#41; and superficial involvement&#46;</p><p id="par0220" class="elsevierStylePara elsevierViewall">In the second case&#44; a high degree of cellular pleomorphism was significantly associated with deep invasion&#46; DFSP is by definition a tumor with minimal pleomorphism&#44; and when present&#44; pleomorphic cells tend to be found largely in fibrosarcomatous areas&#44; which have been identified as an adverse prognostic factor&#46;<a class="elsevierStyleCrossRef" href="#bib0190"><span class="elsevierStyleSup">17</span></a> Degree of cellular pleomorphism could thus be considered to be a relevant factor when it comes to predicting deep invasion in DFPS&#46; Marked pleomorphism has also been identified as an important prognostic factor for recurrence and metastasis&#46;<a class="elsevierStyleCrossRefs" href="#bib0175"><span class="elsevierStyleSup">14&#44;17&#44;20&#44;21</span></a></p><p id="par0225" class="elsevierStylePara elsevierViewall">Finally&#44; our finding that the presence of more than 1 mitotic figure was significantly associated with a greater risk of invasion of the fascia or galea aponeurotica is consistent with reports in the literature&#44; which have shown high mitotic activity to be significantly correlated with recurrence<a class="elsevierStyleCrossRef" href="#bib0190"><span class="elsevierStyleSup">17</span></a> and to be linked to a 14&#37; increased risk of death&#46;<a class="elsevierStyleCrossRef" href="#bib0205"><span class="elsevierStyleSup">20</span></a> Number of mitotic figures has also been associated with the presence of fibrosarcomatous areas&#46;<a class="elsevierStyleCrossRef" href="#bib0175"><span class="elsevierStyleSup">14</span></a></p><p id="par0230" class="elsevierStylePara elsevierViewall">The retrospective design of this study constitutes a limitation&#44; which could be overcome by performing a long-term prospective study to demonstrate that the factors we found to be significantly associated with deep invasion are more common in cases of recurrence&#46; Such a study is challenging&#44; however&#44; considering that MMS&#44; the treatment of choice for DFSP&#44; is associated with low recurrence rates&#46;</p><p id="par0235" class="elsevierStylePara elsevierViewall">In conclusion&#44; our results show that greater attention should be paid to cases of DFSP with a sheetlike and cartwheel pattern&#44; a high degree of cellular pleomorphism&#44; and more than 1 mitotic figure&#44; as these factors appear to be associated with a greater risk of involvement of the muscle fascia&#46; Finally&#44; the fact that almost 30&#37; of the tumors in our series had invaded the fascia or muscle should be taken into account when planning surgical treatment&#46;</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0095">Ethical Disclosures</span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0100">Protection of humans and animals</span><p id="par0240" class="elsevierStylePara elsevierViewall">The authors declare that no tests were carried out in humans or animals for the purpose of this study&#46;</p></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0105">Confidentiality of data</span><p id="par0245" class="elsevierStylePara elsevierViewall">The authors declare that they have followed their hospital&#39;s protocol on the publication of data concerning patients&#46;</p></span><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0110">Right to privacy and informed consent</span><p id="par0250" class="elsevierStylePara elsevierViewall">The authors declare that no private patient data appear in this article&#46;</p></span></span><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0115">Conflicts of Interest</span><p id="par0255" class="elsevierStylePara elsevierViewall">The authors declare that they have no conflicts of interest&#46;</p></span></span>"
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    "fechaRecibido" => "2015-10-30"
    "fechaAceptado" => "2016-02-02"
    "PalabrasClave" => array:2 [
      "en" => array:1 [
        0 => array:4 [
          "clase" => "keyword"
          "titulo" => "Keywords"
          "identificador" => "xpalclavsec819504"
          "palabras" => array:3 [
            0 => "Dermatofibrosarcoma protuberans"
            1 => "Histologic features"
            2 => "Invasion"
          ]
        ]
      ]
      "es" => array:1 [
        0 => array:4 [
          "clase" => "keyword"
          "titulo" => "Palabras clave"
          "identificador" => "xpalclavsec819505"
          "palabras" => array:3 [
            0 => "Dermatofibrosarcoma protuberans"
            1 => "Caracter&#237;sticas histol&#243;gicas"
            2 => "Infiltraci&#243;n"
          ]
        ]
      ]
    ]
    "tieneResumen" => true
    "resumen" => array:2 [
      "en" => array:3 [
        "titulo" => "Abstract"
        "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Background</span><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Dermatofibrosarcoma protuberans &#40;DFSP&#41; is a rare&#44; slow-growing cutaneous tumor that can invade the subcutaneous tissue&#44; muscle tissue&#44; and even bone&#46;</p></span> <span id="abst0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Objective</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">To identify histologic features associated with greater depth of invasion&#44; i&#46;e&#46;&#44; local aggressiveness&#44; in DFSP&#46;</p></span> <span id="abst0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0020">Material and methods</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">We analyzed associations between histologic features of DFSP &#40;e&#46;g&#46;&#44; type of subcutaneous invasion&#44; histologic pattern&#44; cell type&#44; areas of fibrosarcoma&#41; and the presence and absence of muscle fascia involvement&#46;</p></span> <span id="abst0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Results</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">We studied 155 cases of DFSP&#46; The following histologic characteristics were significantly associated with involvement of the muscle fascia&#58; the presence of a sheetlike pattern&#44; a high degree of cellular pleomorphism&#44; and more than 1 mitotic figure&#46; The tumor did not extend beyond the subcutaneous tissue in the majority of cases &#40;62&#46;6&#37;&#41;&#44; but there was involvement of the fascia or galea aponeurotica in 17 cases &#40;11&#37;&#41; and of the muscle tissue in 36 cases &#40;23&#46;2&#37;&#41;&#46;</p></span> <span id="abst0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0030">Conclusions</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">Histologic patterns&#44; degree of pleomorphism&#44; and number of mitotic figures are important predictors of deep invasion &#40;fascia or muscle&#41; in DFSP&#59; these layers can be involved in up to 30&#37; of cases&#46;</p></span>"
        "secciones" => array:5 [
          0 => array:2 [
            "identificador" => "abst0005"
            "titulo" => "Background"
          ]
          1 => array:2 [
            "identificador" => "abst0010"
            "titulo" => "Objective"
          ]
          2 => array:2 [
            "identificador" => "abst0015"
            "titulo" => "Material and methods"
          ]
          3 => array:2 [
            "identificador" => "abst0020"
            "titulo" => "Results"
          ]
          4 => array:2 [
            "identificador" => "abst0025"
            "titulo" => "Conclusions"
          ]
        ]
      ]
      "es" => array:3 [
        "titulo" => "Resumen"
        "resumen" => "<span id="abst0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">Introducci&#243;n</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">El dermatofibrosarcoma protuberans &#40;DFSP&#41; es un raro tumor cut&#225;neo de crecimiento lento e infiltrativo que alcanza el tejido celular subcut&#225;neo&#44; el tejido muscular e incluso el hueso&#46;</p></span> <span id="abst0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Objetivos</span><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">Buscar las caracter&#237;sticas histol&#243;gicas asociadas a una mayor agresividad local en los DFSP&#44; en forma de afectaci&#243;n en profundidad&#46;</p></span> <span id="abst0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Material y m&#233;todos</span><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">Se relacion&#243; las caracter&#237;sticas histol&#243;gicas propias del DFSP &#40;forma de infiltrar el tejido celular subcut&#225;neo&#44; patr&#243;n histol&#243;gico&#44; tipo celular&#44; &#225;reas de fibrosarcoma&#41; con la presencia o ausencia de afectaci&#243;n de la fascia muscular&#46;</p></span> <span id="abst0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0055">Resultados</span><p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">Se incluyeron 155<span class="elsevierStyleHsp" style=""></span>casos de DFSP&#46; Las caracter&#237;sticas histol&#243;gicas asociadas significativamente con la afectaci&#243;n de la fascia muscular fueron&#58; el patr&#243;n histol&#243;gico en s&#225;bana&#44; un alto grado de pleomorfismo celular y la presencia de m&#225;s de una mitosis&#46; En la mayor&#237;a de los casos &#40;62&#44;6&#37;&#41; el tumor se limit&#243; al tejido celular subcut&#225;neo&#44; en 17 casos &#40;11&#37;&#41; contact&#243; con la fascia muscular o con la galea aponeur&#243;tica&#44; y en 36 casos &#40;23&#44;2&#37;&#41; afect&#243; al tejido muscular&#46;</p></span> <span id="abst0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0060">Conclusiones</span><p id="spar0050" class="elsevierStyleSimplePara elsevierViewall">Es importante tener en cuenta el patr&#243;n histol&#243;gico&#44; el pleomorfismo y el n&#250;mero de mitosis en los DFSP para predecir su afectaci&#243;n en profundidad &#40;fascia o m&#250;sculo&#41;&#44; que puede llegar al 30&#37; de los casos&#46;</p></span>"
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            "titulo" => "Introducci&#243;n"
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            "identificador" => "abst0035"
            "titulo" => "Objetivos"
          ]
          2 => array:2 [
            "identificador" => "abst0040"
            "titulo" => "Material y m&#233;todos"
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          3 => array:2 [
            "identificador" => "abst0045"
            "titulo" => "Resultados"
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          4 => array:2 [
            "identificador" => "abst0050"
            "titulo" => "Conclusiones"
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        "etiqueta" => "&#9734;"
        "nota" => "<p class="elsevierStyleNotepara" id="npar0005">Please cite this article as&#58; Serra-Guill&#233;n C&#44; Llombart B&#44; Nagore E&#44; Guill&#233;n C&#44; Requena C&#44; Kindem S&#44; et al&#46; Estudio de los factores histol&#243;gicos asociados a la infiltraci&#243;n en profundidad en el dermatofibrosarcoma protuberans&#46; Actas Dermosifiliogr&#46; 2016&#59;107&#58;414&#8211;420&#46;</p>"
      ]
      1 => array:2 [
        "etiqueta" => "&#9734;&#9734;"
        "nota" => "<p class="elsevierStyleNotepara" id="npar0010">This study was awarded the Antonio Llombart Rodriguez-FINCIVO prize for 2015&#46;</p>"
      ]
    ]
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          "en" => "<p id="spar0055" class="elsevierStyleSimplePara elsevierViewall">Cell distribution patterns&#46; A&#44; Storiform pattern&#46; B&#44; Cartwheel pattern&#46; C&#44; Fascicular pattern&#46;</p>"
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          "en" => "<p id="spar0060" class="elsevierStyleSimplePara elsevierViewall">Histologic variants of dermatofibrosarcoma protuberans&#46; A&#44; Sclerotic&#46; B&#44; Myxoid&#46; C&#44; Fibrosarcomatous&#46; D&#44; Pigmented &#40;Bednar tumor&#41;&#46;</p>"
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              "tabla" => array:1 [
                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Histologic Features&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Results&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="table-entry  " colspan="2" align="left" valign="top"><span class="elsevierStyleItalic">Predominant histologic pattern &#40;n</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">&#61;</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">103&#41;</span></td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Storiform&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">70 &#40;67&#46;9&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Cartwheel&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">13 &#40;12&#46;6&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Sheetlike&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">15 &#40;14&#46;5&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Fascicular&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">5 &#40;4&#46;8&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="2" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="2" align="left" valign="top"><span class="elsevierStyleItalic">Subcutaneous tissue infiltration pattern &#40;n</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">&#61;</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">103&#41;</span></td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Honeycomb&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">48 &#40;46&#46;6&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Digitiform&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">28 &#40;27&#46;1&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Parallel-band&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">12 &#40;11&#46;6&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Compressive&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">15 &#40;14&#46;5&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="2" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="2" align="left" valign="top"><span class="elsevierStyleItalic">Cell density &#40;n</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">&#61;</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">103&#41;</span></td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Moderate&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">57 &#40;55&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>High&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">34 &#40;33&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Very high&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">12 &#40;11&#46;6&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="2" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="2" align="left" valign="top"><span class="elsevierStyleItalic">Predominant cell type &#40;n</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">&#61;</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">103&#41;</span></td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Epithelioid&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">8 &#40;7&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Spindle&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">95 &#40;92&#46;2&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="2" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="2" align="left" valign="top"><span class="elsevierStyleItalic">Cellular pleomorphism &#40;n</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">&#61;</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">103&#41;</span></td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>None&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">5 &#40;4&#46;8&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Minimal&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">60 &#40;58&#46;2&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Moderate&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">32 &#40;31&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>High&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">6 &#40;5&#46;8&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="2" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleItalic">Number of mitotic figures <span class="elsevierStyleBold">&#40;</span>n</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">&#61;</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">103&#41;</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Mean&#46; 1&#46;8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Median 1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">SD&#58; 1&#46;86&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Range&#58; 1-2&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="2" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="2" align="left" valign="top"><span class="elsevierStyleItalic">Areas of fibrosarcoma &#40;n</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">&#61;</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">103&#41;</span></td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Yes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">14 &#40;13&#46;6&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>No&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">89 &#40;86&#46;4&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="2" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="2" align="left" valign="top"><span class="elsevierStyleItalic">Other histologic variants &#40;n</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">&#61;</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">103&#41;</span></td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Pigmented &#40;Bednar Tumor&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">7 &#40;6&#46;7&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Giant cell fibroblastoma&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">1 &#40;0&#46;9&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Myxoid&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">10 &#40;9&#46;7&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Myoid&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">3 &#40;2&#46;9&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Sclerotic&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">16 &#40;15&#46;5&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="2" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="2" align="left" valign="top"><span class="elsevierStyleItalic">Histologic depth of invasion &#40;n</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">&#61;</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">155&#41;</span></td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Subcutaneous tissue&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">99 &#40;63&#46;8&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Muscle fascia or galea aponeurotica&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">16 &#40;7&#46;1&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Muscle&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">35 &#40;22&#46;5&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Periosteum&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">5 &#40;3&#46;2&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
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          "leyenda" => "<p id="spar0075" class="elsevierStyleSimplePara elsevierViewall">Abbreviation&#58; NS&#44; not significant&#46;</p>"
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                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td-with-role" title="table-head ; entry_with_role_rowhead " align="left" valign="top" scope="col">Histologic Features &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">&#61;</span><span class="elsevierStyleHsp" style=""></span>73&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " colspan="4" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">Invasion of Muscle Fascia</th><th class="td" title="table-head  " align="left" valign="top" scope="col"><span class="elsevierStyleItalic">P</span> Value&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr><tr title="table-row"><th class="td" title="table-head  " align="" valign="top" scope="col">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">Absent</th><th class="td" title="table-head  " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">Present</th><th class="td" title="table-head  " align="" valign="top" scope="col">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr><tr title="table-row"><th class="td" title="table-head  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">No&#46;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">&#37;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">No&#46;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">&#37;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleItalic">Predominant histologic pattern</span></td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Storiform&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">30&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">57&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">22&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">42&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Cartwheel&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">40&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">60&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">&#46;029&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Sheetlike&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">10&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">90&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Fascicular&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">100&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">0&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">0&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleItalic">Subcutaneous tissue infiltration pattern</span></td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Honeycomb&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">22&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">59&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">15&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">40&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Digitiform&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">10&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">47&#46;6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">11&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">52&#46;4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Parallel-band&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">12&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">87&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">NS &#40;&#46;112&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Compressive&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">42&#46;9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">57&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleItalic">Cell density</span></td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Moderate&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">22&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">57&#46;9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">16&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">42&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">NS &#40;&#46;279&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>High&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">11&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">42&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">15&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">57&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Very high&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">33&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">66&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleItalic">Predominant cell type</span></td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Spindle&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">36&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">50&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">35&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">49&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">NS &#40;&#46;157&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Epithelioid&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">0&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">0&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">2&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">100&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleItalic">Cellular pleomorphism</span></td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>None&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">25&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">75&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Minimal&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">28&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">62&#46;2&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">17&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">37&#46;8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#46;029&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Moderate&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">33&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">14&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">66&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>High&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">0&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">0&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">100&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleItalic">Number of mitotic figures</span></td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>&#8804;<span class="elsevierStyleHsp" style=""></span>1 mitotic figure&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">25&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">62&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">15&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">37&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">&#46;013&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleHsp" style=""></span>&#62;<span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleHsp" style=""></span>1 mitotic figure&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">11&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">33&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">22&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">66&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleItalic">Areas of fibrosarcoma</span></td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>No&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">35&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">52&#46;2&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">32&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">47&#46;8&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">16&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">83&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="6" align="left" valign="top"><span class="elsevierStyleItalic">Histologic variants</span></td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Pigmented &#40;Bednar Tumor&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">60&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">2&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">40&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">0&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">0&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">100&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">33&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">66&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">33&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">2&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">66&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Sclerotic&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">66&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">33&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
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          "en" => "<p id="spar0070" class="elsevierStyleSimplePara elsevierViewall">Association Between Histologic Features and Involvement of the Muscle Fascia or Galea Aponeurotica in Primary Dermatofibrosarcoma Protuberans&#46;</p>"
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