title: Unusual presentations of carcinoma of the right colon.
abstract: Two unusual presentations of carcinoma of the right colon are described. One of the two patients presented with a right gluteal abscess and the other presented with a colocutaneous fistula to the anterior abdominal wall at the site of a previous appendectomy scar. Despite extensive local tumor invasion of adjacent structures in both cases, all the regional lymph nodes were free of cancer and the tumors were of low-grade malignancy. A review of the literature indicates that bulky colonic tumors with extensive local invasion and negative mesenteric lymph nodes have a relatively good prognosis if adequate resection is performed.
mesh_terms: D000009:Abdominal Muscles; D000038:Abscess / Q000473:pathology; D000230:Adenocarcinoma / Q000473:pathology*; D002288:Adenocarcinoma, Mucinous / Q000473:pathology*; D000368:Aged; D002430:Cecal Neoplasms / Q000473:pathology; D003110:Colonic Neoplasms / Q000473:pathology* / Q000601:surgery; D005260:Female; D006801:Humans; D007412:Intestinal Fistula / Q000473:pathology; D007416:Intestinal Perforation / Q000473:pathology; D008297:Male; D008875:Middle Aged