Gastrointestinal cancers refer to a group of cancers that affect the digestive system, including the esophagus, stomach, small intestine, colon, and rectum. These cancers can develop in various parts of the gastrointestinal tract and may present symptoms such as abdominal pain, changes in bowel habits, and unexplained weight loss. Early detection is crucial for effective treatment. Common types of gastrointestinal cancers include colorectal cancer, gastric cancer, and esophageal cancer. Risk factors may include age, family history, diet, and certain medical conditions. Regular screenings and a healthy lifestyle can help reduce the risk of developing these cancers.