Angiokeratoma

From dermoscopedia

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 Authored by: Pedro Zaballos     ·  Ignacio Gómez Martín

 Keywords:   angiokeratoma
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Description This chapter describes dermoscopyThe examination of [skin lesions] with a 'dermatoscope'. This traditionally consists of a magnifier (typically x10), a non-polarised light source, a transparent plate and a liquid medium between the instrument and the skin, and allows inspection of skin lesions unobstructed by skin surface reflections. Modern dermatoscopes dispense with the use of liquid medium and instead use polarised light to cancel out skin surface reflections. of angiokeratomais a benign cutaneous lesion of capillaries, resulting in small marks of red to blue color and characterized by hyperkeratosis
Author(s) Pedro Zaballos · Ignacio Gómez Martín
Responsible author Pedro Zaballos→ send e-mail
Status unknown
Status update August 5, 2017
Status by Ralph P. Braun


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Angiokeratomas are acquired vascular lesions that present as shiny, soft, dark red to violaceous, 2–10 mm papules which may develop a blue-violaceous to black colorColor (American English) or colour (Commonwealth English) is the characteristic of human visual perception described through color categories, with names such as red, yellow, purple, or blue. and a surface scale[1]. Four clinical subtypes of angiokeratomas have been described: solitary angiokeratoma (the most common type), angiokeratoma of Mibelli, angiokeratoma of Fordyce, and angiokeratoma corporis diffusum.

DermoscopyThe examination of [skin lesions] with a 'dermatoscope'. This traditionally consists of a magnifier (typically x10), a non-polarised light source, a transparent plate and a liquid medium between the instrument and the skin, and allows inspection of skin lesions unobstructed by skin surface reflections. Modern dermatoscopes dispense with the use of liquid medium and instead use polarised light to cancel out skin surface reflections.:

  • Dark lacunaeThis glossary term has not yet been described.: sharply demarcated, ovoid structuresThis glossary term has not yet been described. with a dark blue, dark violaceous or black color.
  • Blue-White veil: confluent blue pigmentation with an overlying whitish haze.
  • Ulceration and surface scale may be present.
  • Rarely, rainbow patternCircumscribed structureless areas displaying colors of the whole spectrum of visible light may be present.

  1. Zaballos et al.: Dermoscopy of solitary angiokeratomas: a morphological study. Arch Dermatol 2007;143:318-25. PMID: 17372096. DOI.