Cutaneous angiosarcoma of the lower leg.

Angiosarcoma is a vascular malignancy that can affect various anatomic sites. Although rare, cutaneous angiosarcoma is the most common clinical manifestation, accounting for approximately 50% to 60% of cases. Cutaneous angiosarcoma typically is known to occur in 3 settings: (1) idiopathic, (2) following radiation treatment, and (3) in the setting of chronic lymphedema following mastectomy (known as Stewart-Treves syndrome). The clinical manifestation of angiosarcoma can mimic other processes. We present a case of cutaneous angiosarcoma on the leg in an elderly woman in the setting of a chronic nonhealing wound and lymphedema. We also discuss the differential diagnosis and treatment options.