多発病巣を有し長期生存した直腸悪性黒色腫の１例

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  • Long-Term Survivor of Anorectal Melanoma with Multiple Lesions A Case Report

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Anorectal malignant melanoma is rare and has a very poor prognosis. We report a case successfully treated without any sign of recurrence in the more than 7 years following surgery. A 74-year-old woman presented with a three-month history of anal bleeding. A biopsy specimen from the tumor revealed malignant melanoma. A pigmented mass 5.5 cm in diameter was found on the anterior wall of the anus. A satellite nodule 1.6 cm in diameter was found on the left wall of the anus. She underwent an abdominoperineal resection. Microscopic features were as follows: malignant melanoma mp, ow(-), aw(-), ew(-), satellite lesion was sm, n0. Adjuvant chemotherapy was not performed. Although the treatment of malignant melanoma is controversial (local excision or radical excision), curative operation is important for long-term survival.

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