Abstract
Cutaneous radiation-associated angiosarcoma (cRAA) is a rare and aggressive secondary cutaneous angiosarcoma (cAS) with poor survival. cRAA has been mostly reported in breast carcinoma patients. Owing to its rarity, there is scanty literature available and no treatment guidelines. To the best of our knowledge, this is the first report of cRAA after multimodality treatment of carcinoma penis. A sixty-eight-year-old gentleman, a known case of carcinoma penis, underwent total penectomy with perineal urethrostomy and bilateral radical inguinopelvic lymph node dissection 6 years ago. He received adjuvant radiotherapy to the pelvis and bilateral groin. He presented with a bleeding plaque-like lesion with ulceration over the left lower abdomen (within previous radiation field) which rapidly progressed in size over the past 2 months. On examination, the lesion bled profusely on touch. Contrast MRI was suggestive of lobulated exophytic enhancing cutaneous lesion free from underlying muscle. Wedge biopsy was suggestive of cutaneous angiosarcoma. He underwent wide local excision with local perforator flap reconstruction from the right lower abdomen. Histopathology was suggestive of cutaneous angiosarcoma which showed immunoexpression of CD31, ERG1, cMYC suggestive of cRAA. cRAA is a very aggressive disease with 5-year survival of 15-34%. To the best of our knowledge, this is the first ever reported case of cRAA of lower abdomen after multimodality management of carcinoma penis. It masquerades with other benign and less aggressive radiation-induced skin lesions. cMYC immunoexpression is specific for secondary cAS. Wide local resection with negative margin provides the best outcome.