Malignant change in rectal duplication.
D002288:Adenocarcinoma, Mucinous / Q000209:etiology / Q000473:pathology*; D000328:Adult; D003560:Cysts / Q000209:etiology / Q000473:pathology; D005260:Female; D006801:Humans; D012004:Rectal Neoplasms / Q000209:etiology / Q000473:pathology*; D012007:Rectum / Q000002:abnormalities*