Cutaneous Angiosarcoma of the Knee: A Case Report and Review of the Literature

Cutaneous angiosarcoma is a rare, malignant, vascular tumor that usually occurs in the scalp and face region of elderly white men. The tumor also can involve areas of prior irradiation; chronic lymphedema, otherwise known as Stewart-Treves syndrome; and preexisting vascular lesions. We report an unusual case of angiosarcoma occurring on the knee of a 70-year-old white woman with a strong family history of malignant melanoma in the absence of any known predisposing features.