Colorectal Neoplasia and Inflammatory Bowel Disease.

Inflammatory bowel disease is associated with an increased risk of gastrointestinal neoplasia. Ulcerative colitis increases the risk of colorectal cancer, and patients with this condition should undergo routine colonoscopic surveillance to detect neoplasia. Crohn's disease increases the risk of malignancy in inflamed segments of bowel, which may include small bowel, colon, rectum, and anus.