the pancreas, and 2400 other unspecified digestive tract ma­ lignancies. This combined incidence is second only to the number of new cases of lung cancer. Bleeding from the gastrointestinal tract represents one of the earliest findings with re­ gard to malignancy of the gastrointestinal tract. In general, personal or family history of colon and rectal cancer, personal or family history of polyps in the colon or rectum, or inflammatory bowel disease are high risk factors with regard to tumors in these loca­ tions. Dietary behavior is also important in that a diet high in fat and/or low in fiber content may be a significant causative factor.