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Cutaneous angiosarcoma (CA) is a rare and aggressive malignant tumor that develops from vascular endothelium. Secondary CAs are often caused by radiotherapy and chronic lymphedema. Most radiation‐induced CAs are associated with breast or gynecologic cancer. The prognosis of CA is extremely poor, with a 5‐year survival rate ranging from 12% to 34%. Therapeutic options are limited, and surgical excision...