Radiotherapy-associated angiosarcoma (RAA) of the breast is a rare complication of radiotherapy, which is often difficult to identify and has poor prognosis. It usually presents as violaceous skin, erythema or rapidly growing palpable firm mass that can be confused with other benign skin lesions.

中文翻译：

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通过自体游离皮瓣重建并用电化学疗法治疗的乳房中放疗相关的血管肉瘤

乳房放疗相关血管肉瘤（RAA）是一种罕见的放疗并发症，通常难以识别且预后较差。它通常表现为紫罗兰色皮肤、红斑或快速增长的可触及的坚硬肿块，可能与其他良性皮肤病变相混淆。