Intra-abdominal desmoid tumor.

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.