Small intestine cancer is a rare disease in which malignant cells form in the tissues of the small intestine. The types of cancer found in the small intestine are adenocarcinoma, sarcoma, carcinoid tumors, gastrointestinal stromal tumor, and lymphoma. Diet and health history can affect the risk of developing small intestine cancer. Possible signs of small intestine cancer include abdominal pain and unexplained weight loss.
The prognosis (chance of recovery) and treatment options depend on the type of small intestine cancer, whether the cancer has spread to other places in the body, whether the cancer can be completely removed by surgery and whether the cancer is newly diagnosed or has recurred.