A small intestine tumor is an abnormal growth that occurs in the small intestine, which is part of the digestive system. These tumors can be benign (non-cancerous) or malignant (cancerous) and may cause symptoms such as abdominal pain, nausea, and weight loss. Diagnosis often involves imaging tests like CT scans or MRI, and treatment options may include surgery, chemotherapy, or radiation therapy, depending on the type and stage of the tumor. Early detection is important for better outcomes, as small intestine tumors can be challenging to identify.