- A primary or metastatic malignant neoplasm involving the small intestine, large intestine, or both. Representative examples are carcinomas, lymphomas, and sarcomas.
- Your small intestine is part of your digestive system. It is a long tube that connects your stomach to your large intestine. Intestinal cancer is rare, but eating a high-fat diet or having crohn's disease, celiac disease, or a history of colonic polyps can increase your risk.abdominal pain or lumps, weight loss for no reason or blood in the stool can be symptoms. Imaging tests that create pictures of the small intestine and the area around it can help diagnose intestinal cancer and show whether it has spread.surgery is the most common treatment. Additional options include chemotherapy, radiation or a combination. nih: national cancer institute
159 Malignant neoplasm of other and ill-defined sites within the digestive organs and peritoneum 
159.0 Malignant neoplasm of intestinal tract, part unspecified convert 159.0 to ICD-10-CM