A patient with adenomatous polyposis coli (APC) without extraintestinal lesions is presented. The clinical course was complicated by rectal adenocarcinoma following subtotal colectomy. A primary adenocar‐cinoma arising in a villous adenoma within the ileostomy stoma developed seven years later. The varied pathology of gastric and small intestinal involvement in APC/Gardner's syndrome is reviewed. Greater awareness of these lesions has implications for further management.

Colonogastric fistula, more commonly called "gastrocolic," is a rare complication of Crohn's colitis. The 17th incidence of this fistula is reported. Fecal halitosis is a prominent symptom. Barium enema is the most accurate diagnostic tool. Colonoscopy plays a role in delineating surgical therapy. The stomach resection is described. Because of its pathogenesis, the authors prefer to call this "colonogastric" fistula, rather than gastrocolic fistula.

Intra-abdominal desmoid tumors are known to be associated with familial polyposis coli, but have not been previously described in association with carcinoma of the sigmoid colon. This is a case report of a patient with intra-abdominal desmoid tumor associated with carcinoma of the sigmoid colon which manifested as a small-bowel obstruction. This appears to be the first case of its kind reported.