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Malignancies that arise from the small intestine are quite rare. They include many histologic subtypes including: adenocarcinoma, lymphoma, sarcoma, and neuroendocrine tumours. This section addresses adenocarcinomas arising from the duodenum, jejunum and ileum. Please refer to the linked sections for management of all other subtypes.
(per College of American Pathologists 2012)
Staging diagram - small intestine
Due to the rarity of malignancies arising from the small bowel, there are no recommended surveillance guidelines.
Patients with a small bowel adenocarcinoma are known to have a higher incidence of secondary malignancies involving the colon, rectum, ampulla of Vater, endometrium and ovary which warrants early investigation of any worrisome symptoms.
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