title: Atypical angiomatosis in polyarteritis nodosa.
abstract: Biopsies from an area of livedo reticularis and adjacent to a leg ulcer in a woman with polyarteritis nodosa showed florid angioendothelial proliferation simulating angiosarcoma. This angioproliferative reaction has not been described previously in polyarteritis nodosa. Its microscopic differentiation from angiosarcoma is important.
mesh_terms: D000328:Adult; D000798:Angiomatosis / Q000175:diagnosis / Q000209:etiology* / Q000473:pathology; D003937:Diagnosis, Differential; D005260:Female; D006394:Hemangiosarcoma / Q000175:diagnosis; D006801:Humans; D010488:Polyarteritis Nodosa / Q000150:complications*; D012878:Skin Neoplasms / Q000175:diagnosis / Q000209:etiology* / Q000473:pathology