It is a condition characterized by the presence of numerous internal polyps,especially a hereditary disease which affects the colon and in which the polyps may become malignant.
Symptoms: patients may experience blood in the stool, diarrhea, mucous discharge, crampy abdominal pain, anemia, weight loss and intestinal obstruction.
Diagnosis: igmoidoscopy. A flexible tube is inserted into your rectum to inspect the rectum and sigmoid — the last two feet of the colon. At Mayo, sigmoidoscopy is used to screen at-risk children who haven't yet developed polyps. Colonoscopy.