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Rectal Carcinoma
Definition 1
A malignant epithelial neoplasm that arises from the rectum and invades through the muscularis mucosa into the submucosa. The vast majority are adenocarcinomas. (NCI Thesaurus)
Definition 2
Cancer that forms in the tissues of the rectum (the last several inches of the large intestine closest to the anus). (NCI Dictionary)
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