PubMed · 5982158
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I A Ionova. 1966. [Diffuse angiokeratoma].. https://pubmed.ncbi.nlm.nih.gov/5982158/
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We report a case of angiokeratoma circumscriptum which we have followed for one year. The skin lesion initially showed erythema and then changed to a dark reddish, raised, keratotic nodule. The lesion histologically showed dilated capillaries and hyperkeratosis. Using immunohistochemistry, matrix metalloproteinase (MMP)-9 was localized in the epidermis just under the horny layer, particularly in the hyperkeratotic lesion. The expression of MMP-9 might be related to the hyperkeratotic changes in this lesion.
We report a case of Fordyce angiokeratoma which presented with bleeding from the scrotum. The difference between Fordyce's angiokeratoma and Fabry's angiokeratoma corporis diffusum is described. The diagnosis, treatment and prognosis of scrotal angiokeratoma are discussed.
Angiokeratomas are vascular lesions which are defined histologically as one or more dilated blood vessel(s) lying directly subepidermal and showing an epidermal proliferative reaction. At the center of pathogenesis there is a capillary ectasia in the papillary dermis. The epidermal changes in all forms of angiokeratoma are secondary. The different entities causing vessel ectasia lead to the many clinical variants of angiokeratoma. Current classification distinguishes between widespread forms (angiokeratoma corporis diffusum), which is usually associated with an inborn error of metabolism, and localized forms, which include solitary angiokeratoma, Fordyce's angiokeratoma, angiokeratoma circumscriptum naeviforme and angiokeratoma of Mibelli.