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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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Journal Information
Vol. 112. Issue 4.
Pages 359-360 (April 2021)
Visits
3892
Vol. 112. Issue 4.
Pages 359-360 (April 2021)
Practical Dermoscopy
Open Access
Tumor arteriovenoso: pistas dermatoscópicas para su sospecha
Arteriovenous Tumor: Dermoscopic Clues
Visits
3892
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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Case Presentation

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. The lesion, which was firm and measured 15 mm in diameter, was papulonodular, dome-shaped, and erythematous-violaceous in color (Fig. 1A).

Figure 1.

A, Firm erythematous-violaceous, papulonodular lesion on the external aspect of the left arm. B, Dermoscopic image showing whitish structures on an erythematous base, nonarborizing telangiectasias, vessels with a glomerular appearance, and a slight brown reticular pattern mainly on the periphery.

(0.1MB).
What Is Your Diagnosis?

Arteriovenous tumor.

Comment

Polarized light dermoscopy revealed the presence of whitish structures, a slightly brown reticular pattern mainly on the periphery, and vascular structures (nonarborizing telangiectasias in areas with a glomerular appearance), all on an erythematous base (Fig. 1A).

Given the clinical and dermoscopic characteristics of the lesion, the differential diagnosis was made with a vascular lesion, including arteriovenous tumor, aneurysmal dermatofibroma, and hypomelanotic nodular melanoma. The lesion was removed completely (Fig. 2).

Figure 2.

Well-circumscribed vascular proliferation in the dermis, with vessels covered with a single layer of endothelial cells. Some vessels have a thick fibromuscular wall, with no definitive presence of elastic lamina, whereas others have a thinner wall (hematoxylin-eosin, ×40).

(0.19MB).

Histopathology revealed a well-circumscribed—but not encapsulated—proliferation comprising aggregated vessels in the dermis covered by a single layer of endothelial cells without atypia. Some vessels had a thick fibromuscular wall, with no definitive elastic lamina, and others had a thinner wall.

Arteriovenous tumor, or acral arteriovenous tumor, is a benign vascular tumor that is clinically difficult to diagnose. It usually manifests as a solitary, asymptomatic lesion mainly at acral sites, such as the head and limbs.1 It has been reported to appear on patch-like capillary malformations such as port wine stains.2

Histopathologically, 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. It has been suggested that this is a hamartomatous proliferation of the subpapillary plexus.3,4

A recent study of 39 cases summarized the dermoscopic characteristics of these lesions. The dermoscopic pattern most commonly associated with arteriovenous tumor was nonarborizing telangiectasias on a reddish background (72% of cases) in the absence of the lacunae that are typical of other vascular tumors. Furthermore, whitish structures and a slightly pigmented peripheral network were detected in 49% and 18% of cases, respectively.4

While it is true that dermoscopy can reveal vascular structures in aneurysmal dermatofibroma, these are observed at the edge of the lesion, probably in association with blood vessels of the surrounding stroma. This type of tumor has irregular spaces filled with red cells, although they lack an endothelial layer and, therefore, are not seen as central telangiectasias in dermoscopy, but as homogeneous reddish or bluish areas.5

In the case of hypomelanotic nodular melanoma, the relevant findings include a clearly atypical vascular pattern, mainly with irregular linear vessels and hairpin vessels, as well as milky red areas. In this context, pigment networks are unusual.6

In conclusion, dermoscopy could prove to be a useful tool for the diagnosis of arteriovenous tumor. However, the definitive diagnosis of this type of lesion necessarily requires a histopathology work-up.

Conflicts of Interest

The authors declare that they have no conflicts of interest.

References
[1]
M.G. Connelly, R.K. Winkelmann.
Acral arteriovenous tumor. A clinicopathologic review.
Am J Surg Pathol., 9 (1985), pp. 15-21
[2]
N.Y. Yoon, S.K. Ahn, S.P. Hong.
An acral arteriovenous tumor arising within a facial port-wine stain.
Int J Dermatol., 53 (2014), pp. e226-8
[3]
I.G. Koutlas, J. Jessurun.
Arteriovenous hemangioma: a clinicopathological and immunohistochemical study.
J Cutan Pathol., 21 (1994), pp. 343-349
[4]
P. Zaballos, C. Medina, L.J. Del Pozo, I. Gómez-Martín, J. Bañuls.
Dermoscopy of arteriovenous tumor: A morphological study of 39 cases.
Australas J Dermatol., 59 (2018), pp. e253-e257
[5]
P. Zaballos, A. Llambrich, M. Ara, Z. Olazarán, J. Malvehy, S. Puig.
Dermoscopic findings of haemosiderotic and aneurysmal dermatofibroma: report of six patients.
Br J Dermatol., 154 (2006), pp. 244-250
[6]
S.W. Menzies, F.J. Moloney, K. Byth, M. Avramidis, G. Argenziano, I. Zalaudek, et al.
Dermoscopic evaluation of nodular melanoma.
JAMA Dermatol., 149 (2013), pp. 699-709

Please cite this article as: Álvarez-Salafranca M, Fuentelsaz V, Cebrián García C. Tumor arteriovenoso: pistas dermatoscópicas para su sospecha. Actas Dermosifiliogr. 2021;112:359–360.

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