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Definition: The distal and narrowest portion of the small intestine, between the jejunum and the ileocecal valve of the large intestine.

Body System: Digestive

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ICD10 Codes Containing Term: ileum

C17.2 Malignant neoplasm of ileum
C7A.012 Malignant carcinoid tumor of the ileum
D3A.012 Benign carcinoid tumor of the ileum
Q41.2 Congenital absence, atresia and stenosis of ileum
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