A case of superficial angiomyxoma arising in the anal canal

Abstract

A rare case of superficial angiomyxoma (SAM) arising in the anal canal is reported. A 69-year-old man with gastric cancer who was being followed postoperatively developed a left inguinal hernia and an anal polyp. Endoscopy showed a peduncular, walnut-sized, elastic-soft mass in the anal canal. Since the mass prolapsed frequently, a transanal resection was performed. On histopathology, the resected specimen was diagnosed as a superficial angiomyxoma. SAM arising in the anal canal is very rare.
SAM is a benign tumor. However, local recurrence is frequent after incomplete resection. Complete resection and careful observation are required.