Anatomy

Ileum

The distal and narrowest portion of the SMALL INTESTINE, between the JEJUNUM and the ILEOCECAL VALVE of the LARGE INTESTINE.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

The distal and narrowest portion of the SMALL INTESTINE, between the JEJUNUM and the ILEOCECAL VALVE of the LARGE INTESTINE.

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Aspects Covered

24 allowable subheadings

Indexed with the subheadings abnormalities, anatomy & histology, blood supply, chemistry, cytology, diagnostic imaging, drug effects, embryology, enzymology, growth & development, immunology, injuries, innervation, metabolism, microbiology, parasitology, pathology, physiology, physiopathology, radiation effects, surgery, transplantation, ultrastructure, virology.

MeSH Record

Indexing Annotation

do not confuse with ILEUS or ILIUM; /surg: consider ILEOSTOMY; inflammation = ILEITIS; ileocecal intussusception or invagination: index under ILEOCECAL VALVE (IM) + INTUSSUSCEPTION (IM) + ILEAL DISEASES (NIM); ileocolic intussusception: index under ILEAL DISEASES (IM) + INTUSSUSCEPTION (IM) but not also COLONIC DISEASES; ileum as smooth muscle is probably MUSCLE, SMOOTH (IM) + ILEUM (NIM); jejuno-ileal bypass or shunt or jejuno-ileostomy in obesity: index under JEJUNOILEAL BYPASS (note XR ref)

MeSH Hierarchy

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MeSH Record

NLM Classification

WI 512

AMA Style

References

  1. National Library of Medicine. Ileum. Medical Subject Headings (MeSH). 2026. Unique ID D007082. http://id.nlm.nih.gov/mesh/2026/D007082
  2. Ileum. In: Wikipedia. https://en.wikipedia.org/wiki/Ileum
  3. Ileum. In: Wikidata. https://www.wikidata.org/wiki/Q233345