Cutaneous angiosarcoma masquerading as herpes zoster.

Angiosarcoma is a rare malignant neoplasm of vascular or lymphatic endothelial origin that has a poor prognosis. The insidious symptoms, aggressive nature, and rare occurrence of this neoplasm leave a paucity of optimal treatment information. We describe the atypical presentation of an 88-year-old man who was diagnosed and treated for herpes zoster (HZ) in a local emergency department; consultation and biopsy obtained through our dermatology clinic later revealed a diagnosis of cutaneous angiosarcoma (CA).