What Is Inflammation of the Third Part of the Small Intestine Called?


Quick Answer

Ileitis is inflammation of the ileum, the third and final segment of the small intestine. Ileitis is often caused by Crohn's disease, but it can also be caused by spondyloarthropathies or vasculitides, says the National Center for Biotechnology Information. Bacterial infections, such as Yersinia, Salmonella or C. difficile, can also cause ileitis.

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Full Answer

The small intestine is anatomically divided into three sections: the duodenum, jejunum and ileum. The ileum is separated from the cecum of the large intestine by the ileocecal valve. In humans, the ileum is approximately 2 to 4 meters long. The ileum contains lymphoid nodules known as Peyer's patches, which contain a large number of lymphocytes and other immunological response cells. The ileum's primary function is to absorb vitamin B12, bile salts and any remaining digestive products not absorbed by the jejunum.

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