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The small intestine or small bowel is the part of the gastrointestinal tract between the stomach and the large intestine, and is where most of the end absorption of food takes place.
Tumors in the small intestine may block the flow of food and affect digestion. As the tumor gets bigger, the blockages may cause pain in the abdomen. A slowly bleeding tumor may lead to anemia. Digested blood may cause the stool to become black or tarry. An obstruction—when the flow of food is completely blocked—may cause intense pain, nausea and vomiting and typically requires immediate surgery.
If there is a reason to suspect you have a small intestinal cancer, the doctor will use one or more methods to find out if the disease is really present.
Medical history and physical exam
When a doctor takes your medical history, you will be asked questions about your symptoms and risk factors. The doctor will specifically ask about symptoms that could be caused by a mass in the intestines and examine you, concentrating on your abdomen looking for any swelling or sounds of the bowel trying to overcome a blockage.
If your doctor suspects an intestine cancer, he or she will likely order some blood tests, such as:
Other methods of screening include: