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a slightly brown reticular pattern mainly on the periphery&#44; and vascular structures &#40;nonarborizing telangiectasias in areas with a glomerular appearance&#41;&#44; all on an erythematous base &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>A&#41;&#46;</p><p id="par0020" class="elsevierStylePara elsevierViewall">Given the clinical and dermoscopic characteristics of the lesion&#44; the differential diagnosis was made with a vascular lesion&#44; including arteriovenous tumor&#44; aneurysmal dermatofibroma&#44; and hypomelanotic nodular melanoma&#46; The lesion was removed completely &#40;<a class="elsevierStyleCrossRef" href="#fig0010">Fig&#46; 2</a>&#41;&#46;</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia><p id="par0025" class="elsevierStylePara elsevierViewall">Histopathology revealed a well-circumscribed&#8212;but not encapsulated&#8212;proliferation comprising aggregated vessels in the dermis covered by a single layer of endothelial cells without atypia&#46; Some vessels had a thick fibromuscular wall&#44; with no definitive elastic lamina&#44; and others had a thinner wall&#46;</p><p id="par0030" class="elsevierStylePara elsevierViewall">Arteriovenous tumor&#44; or acral arteriovenous tumor&#44; is a benign vascular tumor that is clinically difficult to diagnose&#46; It usually manifests as a solitary&#44; asymptomatic lesion mainly at acral sites&#44; such as the head and limbs&#46;<a class="elsevierStyleCrossRef" href="#bib0005"><span class="elsevierStyleSup">1</span></a> It has been reported to appear on patch-like capillary malformations such as port wine stains&#46;<a class="elsevierStyleCrossRef" href="#bib0010"><span class="elsevierStyleSup">2</span></a></p><p id="par0035" class="elsevierStylePara elsevierViewall">Histopathologically&#44; the lesion is a well-circumscribed proliferation in the papillary dermis composed of multiple vascular spaces with thick walls interspersed with other spaces with thin walls&#46; It has been suggested that this is a hamartomatous proliferation of the subpapillary plexus&#46;<a class="elsevierStyleCrossRefs" href="#bib0015"><span class="elsevierStyleSup">3&#44;4</span></a></p><p id="par0040" class="elsevierStylePara elsevierViewall">A recent study of 39 cases summarized the dermoscopic characteristics of these lesions&#46; The dermoscopic pattern most commonly associated with arteriovenous tumor was nonarborizing telangiectasias on a reddish background &#40;72&#37; of cases&#41; in the absence of the lacunae that are typical of other vascular tumors&#46; Furthermore&#44; whitish structures and a slightly pigmented peripheral network were detected in 49&#37; and 18&#37; of cases&#44; respectively&#46;<a class="elsevierStyleCrossRef" href="#bib0020"><span class="elsevierStyleSup">4</span></a></p><p id="par0045" class="elsevierStylePara elsevierViewall">While it is true that dermoscopy can reveal vascular structures in aneurysmal dermatofibroma&#44; these are observed at the edge of the lesion&#44; probably in association with blood vessels of the surrounding stroma&#46; This type of tumor has irregular spaces filled with red cells&#44; although they lack an endothelial layer and&#44; therefore&#44; are not seen as central telangiectasias in dermoscopy&#44; but as homogeneous reddish or bluish areas&#46;<a class="elsevierStyleCrossRef" href="#bib0025"><span class="elsevierStyleSup">5</span></a></p><p id="par0050" class="elsevierStylePara elsevierViewall">In the case of hypomelanotic nodular melanoma&#44; the relevant findings include a clearly atypical vascular pattern&#44; mainly with irregular linear vessels and hairpin vessels&#44; as well as milky red areas&#46; In this context&#44; pigment networks are unusual&#46;<a class="elsevierStyleCrossRef" href="#bib0030"><span class="elsevierStyleSup">6</span></a></p><p id="par0055" class="elsevierStylePara elsevierViewall">In conclusion&#44; dermoscopy could prove to be a useful tool for the diagnosis of arteriovenous tumor&#46; However&#44; the definitive diagnosis of this type of lesion necessarily requires a histopathology work-up&#46;</p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0020">Conflicts of Interest</span><p id="par0060" class="elsevierStylePara elsevierViewall">The authors declare that they have no conflicts of interest&#46;</p></span></span>"
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Practical Dermoscopy
Tumor arteriovenoso: pistas dermatoscópicas para su sospecha
Arteriovenous Tumor: Dermoscopic Clues
M. Álvarez-Salafrancaa,
Corresponding author
marcialaspn@gmail.com

Corresponding author.
, V. Fuentelsaza
a Servicio de Dermatología, Hospital Royo Villanova, Zaragoza, Spain
C. Cebrián Garcíab
b Servicio de Anatomía Patológica, Hospital Royo Villanova, Zaragoza, Spain
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          "en" => "<p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">Well-circumscribed vascular proliferation in the dermis&#44; with vessels covered with a single layer of endothelial cells&#46; Some vessels have a thick fibromuscular wall&#44; with no definitive presence of elastic lamina&#44; whereas others have a thinner wall &#40;hematoxylin-eosin&#44; &#215;40&#41;&#46;</p>"
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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0005">Case Presentation</span><p id="par0005" class="elsevierStylePara elsevierViewall">A 78-year-old man consulted for an asymptomatic cutaneous lesion on the external aspect of his left arm that had first appeared 7 months earlier&#46; The lesion&#44; which was firm and measured 15&#8239;mm in diameter&#44; was papulonodular&#44; dome-shaped&#44; and erythematous-violaceous in color &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>A&#41;&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">What Is Your Diagnosis&#63;</span><p id="par0010" class="elsevierStylePara elsevierViewall">Arteriovenous tumor&#46;</p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Comment</span><p id="par0015" class="elsevierStylePara elsevierViewall">Polarized light dermoscopy revealed the presence of whitish structures&#44; a slightly brown reticular pattern mainly on the periphery&#44; and vascular structures &#40;nonarborizing telangiectasias in areas with a glomerular appearance&#41;&#44; all on an erythematous base &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>A&#41;&#46;</p><p id="par0020" class="elsevierStylePara elsevierViewall">Given the clinical and dermoscopic characteristics of the lesion&#44; the differential diagnosis was made with a vascular lesion&#44; including arteriovenous tumor&#44; aneurysmal dermatofibroma&#44; and hypomelanotic nodular melanoma&#46; The lesion was removed completely &#40;<a class="elsevierStyleCrossRef" href="#fig0010">Fig&#46; 2</a>&#41;&#46;</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia><p id="par0025" class="elsevierStylePara elsevierViewall">Histopathology revealed a well-circumscribed&#8212;but not encapsulated&#8212;proliferation comprising aggregated vessels in the dermis covered by a single layer of endothelial cells without atypia&#46; Some vessels had a thick fibromuscular wall&#44; with no definitive elastic lamina&#44; and others had a thinner wall&#46;</p><p id="par0030" class="elsevierStylePara elsevierViewall">Arteriovenous tumor&#44; or acral arteriovenous tumor&#44; is a benign vascular tumor that is clinically difficult to diagnose&#46; It usually manifests as a solitary&#44; asymptomatic lesion mainly at acral sites&#44; such as the head and limbs&#46;<a class="elsevierStyleCrossRef" href="#bib0005"><span class="elsevierStyleSup">1</span></a> It has been reported to appear on patch-like capillary malformations such as port wine stains&#46;<a class="elsevierStyleCrossRef" href="#bib0010"><span class="elsevierStyleSup">2</span></a></p><p id="par0035" class="elsevierStylePara elsevierViewall">Histopathologically&#44; the lesion is a well-circumscribed proliferation in the papillary dermis composed of multiple vascular spaces with thick walls interspersed with other spaces with thin walls&#46; It has been suggested that this is a hamartomatous proliferation of the subpapillary plexus&#46;<a class="elsevierStyleCrossRefs" href="#bib0015"><span class="elsevierStyleSup">3&#44;4</span></a></p><p id="par0040" class="elsevierStylePara elsevierViewall">A recent study of 39 cases summarized the dermoscopic characteristics of these lesions&#46; The dermoscopic pattern most commonly associated with arteriovenous tumor was nonarborizing telangiectasias on a reddish background &#40;72&#37; of cases&#41; in the absence of the lacunae that are typical of other vascular tumors&#46; Furthermore&#44; whitish structures and a slightly pigmented peripheral network were detected in 49&#37; and 18&#37; of cases&#44; respectively&#46;<a class="elsevierStyleCrossRef" href="#bib0020"><span class="elsevierStyleSup">4</span></a></p><p id="par0045" class="elsevierStylePara elsevierViewall">While it is true that dermoscopy can reveal vascular structures in aneurysmal dermatofibroma&#44; these are observed at the edge of the lesion&#44; probably in association with blood vessels of the surrounding stroma&#46; This type of tumor has irregular spaces filled with red cells&#44; although they lack an endothelial layer and&#44; therefore&#44; are not seen as central telangiectasias in dermoscopy&#44; but as homogeneous reddish or bluish areas&#46;<a class="elsevierStyleCrossRef" href="#bib0025"><span class="elsevierStyleSup">5</span></a></p><p id="par0050" class="elsevierStylePara elsevierViewall">In the case of hypomelanotic nodular melanoma&#44; the relevant findings include a clearly atypical vascular pattern&#44; mainly with irregular linear vessels and hairpin vessels&#44; as well as milky red areas&#46; In this context&#44; pigment networks are unusual&#46;<a class="elsevierStyleCrossRef" href="#bib0030"><span class="elsevierStyleSup">6</span></a></p><p id="par0055" class="elsevierStylePara elsevierViewall">In conclusion&#44; dermoscopy could prove to be a useful tool for the diagnosis of arteriovenous tumor&#46; However&#44; the definitive diagnosis of this type of lesion necessarily requires a histopathology work-up&#46;</p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0020">Conflicts of Interest</span><p id="par0060" class="elsevierStylePara elsevierViewall">The authors declare that they have no conflicts of interest&#46;</p></span></span>"
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Article information
ISSN: 15782190
Original language: English
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Idiomas
Actas Dermo-Sifiliográficas
es en

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