PMID: 6164474Apr 1, 1981Paper

Anorectal melanoma

Cancer
H J WaneboS H Quan

Abstract

Primary malignant melanoma of the anorectum is a rare and virulent malignancy associated with an extremely poor prognosis in spite of aggressive initial therapy. Fifty-one patients with this disease were treated at Memorial Sloan-Kettering Cancer Center during the last 50 years and only six (12%) survived five years. This report views in detail 36 of the patients treated since 1950. In this group there was a female predominance (21 females, 15 males), and median age was in the 6th decade (range 27-75). Common presenting symptoms were pain, bleeding, mass or "hemorrhoids" of 1-12 months duration. In two-thirds, of the cases, a radical surgical approach was attempted. Other therapy included local excision alone or combined with groin dissection, local excision followed by delayed rectal resection and local tumor destruction by cryosurgery or fulguration. Mean survival was 21.5 months. Three patients had palliative treatment only with radiation therapy. Histopathologic study of 30 lesions showed that two-thirds were bulky or polypoid lesions and two-thirds showed junctional changes. The virulent prognosis of primary anorectal melanoma appears directly related to tumor size and thickness. Although all four of the five-year survivor...Continue Reading

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