A malignant neoplasm that arises from the epithelium of any part of the digestive system. Representative examples include colorectal carcinoma, esophageal carcinoma, and pancreatic carcinoma. The disease is digestive system carcinoma (MONDO_0006181). Also known as: carcinoma of digestive system, carcinoma of the gastrointestinal system, gastrointestinal carcinoma, gastrointestinal carcinoma (disease), gastrointestinal system carcinoma.