title: A unique case of a benign disseminated angioproliferation combining features of Kaposi's sarcoma and diffuse dermal angioendotheliomatosis.
abstract: A female patient undergoing chronic hemodialysis had disseminated, violaceous, and partly ulcerated plaques develop on the trunk. Lesions had erupted simultaneously over a period of 4 weeks and resolved within 5 months after steroid treatment. By histopathology, the papillary dermis was densely filled with blood vessels lined by a single layer of differentiated endothelial cells, a growth pattern resembling diffuse dermal angioendotheliomatosis. In some areas, endothelial cells were spindle shaped and formed discontinuous lumina. Red blood cells were interspersed within these slits, giving the lesions a kaposiform appearance. By immunohistochemistry, endothelial cells reacted with the antibodies anti-von Willebrand factor, anti-CD31, and anti-CD34 and with the lectin Ulex europaeus-1. The course of the disease combined with the unusual histopathology makes this case a unique form of a benign disseminated kaposiform angioproliferation.
authors.affiliation: Department of Dermatology, Division of General Dermatology, University of Vienna Medical School, Vienna, Austria.
authors.forename: R
authors.initials: R
authors.lastname: Kunstfeld
authors.forename: P
authors.initials: P
authors.lastname: Petzelbauer
mesh_terms: D018450:Disease Progression; D004727:Endothelium / Q000473:pathology; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008875:Middle Aged; D009389:Neovascularization, Pathologic; D012514:Sarcoma, Kaposi / Q000473:pathology; D012871:Skin Diseases / Q000473:pathology*; D012883:Skin Ulcer / Q000473:pathology*