Primary Anorectal Amelanotic Malignant Melanoma: A Case Report

Abstract

Anorectal mucosa melanoma is a rare malignancy comprising of less than 5 % of all malignancies in this region. It has poor prognosis and no obvious consensus guideline for the treatment is present. It is usually treated on the lines of cutaneous melanoma. Advanced disease due to late diagnosis is grave feature. Surgery is mostly palliative. We reported a case of middle aged with biopsy proven, non-metastaticamelanotic melanoma of anorectum with localized disease presented with bleeding per anum for four months. MRI and colonoscopy revealed localized mass. She was underwent abdominoperineal resection (APR) with adequate surgical margins and nodal dissection. Post-operative base line imaging was negative for any residual disease. She was kept in follow up one year and no recurrence was observed during this time. Patient lost follow up later. Keywords: Anorectal melanoma, Rare entity, Abdominoperineal resection.