Noncutaneous melanoma. Malignant melanoma of the anorectum.
D000328:Adult; D000368:Aged; D001005:Anus Neoplasms; D005260:Female; D006801:Humans; D008297:Male; D008545:Melanoma; D008875:Middle Aged; D009362:Neoplasm Metastasis; D012004:Rectal Neoplasms