title: Technetium scanning in Kaposi's sarcoma and its simulators.
abstract: The clinical picture of ulcerated purple plaques on the legs often suggests several diagnoses: Kaposi's sarcoma, stasis dermatitis, atrophie blanche (livedoid vasculitis), and a poorly understood condition called acroangiodermatitis of Favre-Chaix (pseudo-Kaposi's sarcoma). Even the skin biopsy may not always be conclusive. We describe our experience with three patients with pseudo-Kaposi's sarcoma, one with "true" Kaposi's sarcoma and two with atrophie blanche. Clinical and histopathologic similarities among these three conditions pointed up the need for additional confirmatory studies, i.e., isotope scanning. The technetium scan was positive in both Kaposi's sarcoma and pseudo-Kaposi's sarcoma but negative in atrophie blanche.
mesh_terms: D000169:Acrodermatitis / Q000000981:diagnostic imaging*; D000328:Adult; D000368:Aged; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008297:Male; D011877:Radionuclide Imaging; D012514:Sarcoma, Kaposi / Q000000981:diagnostic imaging*; D012867:Skin / Q000098:blood supply*; D012878:Skin Neoplasms / Q000000981:diagnostic imaging*; D013670:Sodium Pertechnetate Tc 99m; D013577:Syndrome; D013667:Technetium; D014652:Vascular Diseases / Q000000981:diagnostic imaging; D014657:Vasculitis / Q000000981:diagnostic imaging*
chemical_list: D013667:Technetium; D013670:Sodium Pertechnetate Tc 99m