Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN.
Mayo Clin Proc
Desmoid tumor involving the small bowel. Desmoid tumors often occur sporadically, but they occur in 10% to 25% of individuals with familial adenomatous polyposis. Sporadic desmoid tumors can occur in intraabdominal or extraabdominal locations, whereas those associated with familial adenomatous polyposis are most often intraabdominal. The behavior of desmoid tumors can vary from indolent to aggressive.