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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0005">Medical History</span><p id="par0005" class="elsevierStylePara elsevierViewall">An otherwise healthy 45-year-old man consulted for an asymptomatic lesion on the middle third of the right sole that had first appeared 18 months earlier&#46; The patient did not recall injury to the area or the presence of a previous lesion&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Physical Examination</span><p id="par0010" class="elsevierStylePara elsevierViewall">Physical examination revealed a flesh-colored pedunculated tumor measuring 8<span class="elsevierStyleHsp" style=""></span>mm in diameter&#46; The tumor was soft&#44; with a smooth surface&#44; and was located on the middle third of the right sole &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Histopathology</span><p id="par0015" class="elsevierStylePara elsevierViewall">The tumor was removed using excisional biopsy&#46; Histopathology revealed a proliferation of spindle-shaped homogeneous cells immersed in a myxoid stroma in the dermis &#40;<a class="elsevierStyleCrossRef" href="#fig0010">Fig&#46; 2</a>&#44; hematoxylin&#8211;eosin&#44; 200&#215;&#41;&#46; The results of immunohistochemistry were positive for CD34 and negative for S100 &#40;<a class="elsevierStyleCrossRef" href="#fig0015">Fig&#46; 3</a>&#44; immunohistochemistry CD34&#44; 200&#215;&#41;&#46;</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia><elsevierMultimedia ident="fig0015"></elsevierMultimedia><p id="par0020" class="elsevierStylePara elsevierViewall">What is your diagnosis&#63;</p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0020">Diagnosis</span><p id="par0025" class="elsevierStylePara elsevierViewall">Superficial acral fibromyxoma&#46;</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Clinical Course and Treatment</span><p id="par0030" class="elsevierStylePara elsevierViewall">After diagnosis&#44; the surgical margins were extended by 0&#46;5<span class="elsevierStyleHsp" style=""></span>mm&#46; Histology revealed no relevant findings&#46; No signs of recurrence have been observed after 10 months of follow-up&#46;</p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0030">Commentary</span><p id="par0035" class="elsevierStylePara elsevierViewall">Superficial acral fibromyxoma is a benign mesenchymal tumor that mainly affects men in the fifth decade of life&#46; In most published cases&#44; the lesion is found in the periungual and subungual regions&#46;<a class="elsevierStyleCrossRefs" href="#bib0035"><span class="elsevierStyleSup">1&#8211;3</span></a></p><p id="par0040" class="elsevierStylePara elsevierViewall">Clinically&#44; the tumor is usually nonencapsulated&#44; well-circumscribed&#44; polypoid or verrucous&#44; and dome-shaped&#46; It extends throughout the dermis&#44; potentially as far as the subcutaneous tissue&#44; underlying fascia&#44; or periosteal layer&#46;<a class="elsevierStyleCrossRefs" href="#bib0040"><span class="elsevierStyleSup">2&#8211;4</span></a></p><p id="par0045" class="elsevierStylePara elsevierViewall">Radiology findings are nonspecific&#44; although bone erosions or lytic lesions may co-occur in one-third of cases&#46;<a class="elsevierStyleCrossRefs" href="#bib0035"><span class="elsevierStyleSup">1&#8211;5</span></a></p><p id="par0050" class="elsevierStylePara elsevierViewall">Histopathology may reveal hyperkeratosis in the epidermis&#46; Proliferation of spindle-shaped fibroblasts within a myxoid matrix&#44; with nuclear atypia and mast cell infiltration&#44; is a key finding in the dermis&#46; Immunohistochemistry is positive for CD34&#44; CD99&#44; vimentin&#44; and epithelial membrane antigen and negative for neural and muscular differentiation markers &#40;S100&#44; HMB-45&#44; SMA&#44; desmin&#44; and actin&#41;&#46;<a class="elsevierStyleCrossRefs" href="#bib0035"><span class="elsevierStyleSup">1&#44;3&#44;5</span></a></p><p id="par0055" class="elsevierStylePara elsevierViewall">The differential diagnosis includes fibrokeratoma&#44; fibroma&#44; and plantar warts&#46;<a class="elsevierStyleCrossRef" href="#bib0045"><span class="elsevierStyleSup">3</span></a> It is also important to bear in mind tumors that are negative for CD34 &#40;glomus tumor&#44; sclerosing perineurioma&#44; acquired digital fibrokeratoma&#44; and periungual fibroma&#41;&#44; as well as those that are positive for CD34 &#40;superficial angiomyxoma&#44; dermatofibrosarcoma protuberans&#44; and myxoid neurofibroma&#41;&#46;<a class="elsevierStyleCrossRefs" href="#bib0035"><span class="elsevierStyleSup">1&#44;3&#44;5</span></a></p><p id="par0060" class="elsevierStylePara elsevierViewall">The treatment of choice is surgical resection with free margins&#44; since local recurrence is recorded in approximately 20&#37;&#8211;25&#37; of cases&#46; While the natural course of the tumor is benign&#44; the histopathologic spectrum of spindle-shaped fibroblasts is variable&#44; ranging from mild nuclear atypia to major atypia&#44; with transformation to a low-grade malignant tumor being theoretically possible&#46;<a class="elsevierStyleCrossRefs" href="#bib0050"><span class="elsevierStyleSup">4&#44;6</span></a> However&#44; 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Cases for Diagnosis
Pedunculated Papule on the Sole of the Foot
Pápula pedunculada en región plantar
I. Arreguia,
Corresponding author
isidora.arregui@gmail.com

Corresponding author.
, C. Ñancob, F. Mardonesc
a Médico cirujano, Universidad de los Andes, Santiago, Chile
b Residente Dermatología 2° año, Universidad de los Andes, Santiago, Chile
c Dermatólogo, Clínica Universidad de los Andes, Santiago, Chile
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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0005">Medical History</span><p id="par0005" class="elsevierStylePara elsevierViewall">An otherwise healthy 45-year-old man consulted for an asymptomatic lesion on the middle third of the right sole that had first appeared 18 months earlier&#46; The patient did not recall injury to the area or the presence of a previous lesion&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Physical Examination</span><p id="par0010" class="elsevierStylePara elsevierViewall">Physical examination revealed a flesh-colored pedunculated tumor measuring 8<span class="elsevierStyleHsp" style=""></span>mm in diameter&#46; The tumor was soft&#44; with a smooth surface&#44; and was located on the middle third of the right sole &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Histopathology</span><p id="par0015" class="elsevierStylePara elsevierViewall">The tumor was removed using excisional biopsy&#46; Histopathology revealed a proliferation of spindle-shaped homogeneous cells immersed in a myxoid stroma in the dermis &#40;<a class="elsevierStyleCrossRef" href="#fig0010">Fig&#46; 2</a>&#44; hematoxylin&#8211;eosin&#44; 200&#215;&#41;&#46; The results of immunohistochemistry were positive for CD34 and negative for S100 &#40;<a class="elsevierStyleCrossRef" href="#fig0015">Fig&#46; 3</a>&#44; immunohistochemistry CD34&#44; 200&#215;&#41;&#46;</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia><elsevierMultimedia ident="fig0015"></elsevierMultimedia><p id="par0020" class="elsevierStylePara elsevierViewall">What is your diagnosis&#63;</p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0020">Diagnosis</span><p id="par0025" class="elsevierStylePara elsevierViewall">Superficial acral fibromyxoma&#46;</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Clinical Course and Treatment</span><p id="par0030" class="elsevierStylePara elsevierViewall">After diagnosis&#44; the surgical margins were extended by 0&#46;5<span class="elsevierStyleHsp" style=""></span>mm&#46; Histology revealed no relevant findings&#46; No signs of recurrence have been observed after 10 months of follow-up&#46;</p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0030">Commentary</span><p id="par0035" class="elsevierStylePara elsevierViewall">Superficial acral fibromyxoma is a benign mesenchymal tumor that mainly affects men in the fifth decade of life&#46; In most published cases&#44; the lesion is found in the periungual and subungual regions&#46;<a class="elsevierStyleCrossRefs" href="#bib0035"><span class="elsevierStyleSup">1&#8211;3</span></a></p><p id="par0040" class="elsevierStylePara elsevierViewall">Clinically&#44; the tumor is usually nonencapsulated&#44; well-circumscribed&#44; polypoid or verrucous&#44; and dome-shaped&#46; It extends throughout the dermis&#44; potentially as far as the subcutaneous tissue&#44; underlying fascia&#44; or periosteal layer&#46;<a class="elsevierStyleCrossRefs" href="#bib0040"><span class="elsevierStyleSup">2&#8211;4</span></a></p><p id="par0045" class="elsevierStylePara elsevierViewall">Radiology findings are nonspecific&#44; although bone erosions or lytic lesions may co-occur in one-third of cases&#46;<a class="elsevierStyleCrossRefs" href="#bib0035"><span class="elsevierStyleSup">1&#8211;5</span></a></p><p id="par0050" class="elsevierStylePara elsevierViewall">Histopathology may reveal hyperkeratosis in the epidermis&#46; Proliferation of spindle-shaped fibroblasts within a myxoid matrix&#44; with nuclear atypia and mast cell infiltration&#44; is a key finding in the dermis&#46; Immunohistochemistry is positive for CD34&#44; CD99&#44; vimentin&#44; and epithelial membrane antigen and negative for neural and muscular differentiation markers &#40;S100&#44; HMB-45&#44; SMA&#44; desmin&#44; and actin&#41;&#46;<a class="elsevierStyleCrossRefs" href="#bib0035"><span class="elsevierStyleSup">1&#44;3&#44;5</span></a></p><p id="par0055" class="elsevierStylePara elsevierViewall">The differential diagnosis includes fibrokeratoma&#44; fibroma&#44; and plantar warts&#46;<a class="elsevierStyleCrossRef" href="#bib0045"><span class="elsevierStyleSup">3</span></a> It is also important to bear in mind tumors that are negative for CD34 &#40;glomus tumor&#44; sclerosing perineurioma&#44; acquired digital fibrokeratoma&#44; and periungual fibroma&#41;&#44; as well as those that are positive for CD34 &#40;superficial angiomyxoma&#44; dermatofibrosarcoma protuberans&#44; and myxoid neurofibroma&#41;&#46;<a class="elsevierStyleCrossRefs" href="#bib0035"><span class="elsevierStyleSup">1&#44;3&#44;5</span></a></p><p id="par0060" class="elsevierStylePara elsevierViewall">The treatment of choice is surgical resection with free margins&#44; since local recurrence is recorded in approximately 20&#37;&#8211;25&#37; of cases&#46; While the natural course of the tumor is benign&#44; the histopathologic spectrum of spindle-shaped fibroblasts is variable&#44; ranging from mild nuclear atypia to major atypia&#44; with transformation to a low-grade malignant tumor being theoretically possible&#46;<a class="elsevierStyleCrossRefs" href="#bib0050"><span class="elsevierStyleSup">4&#44;6</span></a> However&#44; prognosis is excellent&#44; and&#44; to date&#44; there have been no published reports of malignant transformation or metastases&#46;<a class="elsevierStyleCrossRefs" href="#bib0035"><span class="elsevierStyleSup">1&#44;3&#8211;5</span></a></p></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Conflicts of Interest</span><p id="par0065" class="elsevierStylePara elsevierViewall">The authors declare that they have no financial or personal relationship with other persons or organizations that could give rise to a conflict of interest with respect to the present article&#46;</p></span></span>"
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