Terminal ileum

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Terminal ileum

Micrograph of terminal ileum with mantle cell lymphoma. H&E stain.

Micrograph of terminal ileum with mantle cell lymphoma. Cyclin D1 immunostain.
Latin	Pars terminalis ilei

The terminal ileum is the most distal part of the small intestine. It connects to the cecum, the pouch between the small and the large intestine, via the ileocecal valve.

Pathology of the terminal ileum

It is of importance in medicine as it can be affected in a number of diseases,^[1] including:

Crohn's disease
Tuberculosis
Lymphoma
Neuroendocrine tumours (carcinoid)

Additional images

Ileum
Small intestine
The cecal fossa. The ileum and cecum are drawn backward and upward.

References

↑ Cuvelier, C.; Demetter, P.; Mielants, H.; Veys, EM.; De Vos M, . (Jan 2001). "Interpretation of ileal biopsies: morphological features in normal and diseased mucosa.". Histopathology 38 (1): 1–12. doi:10.1046/j.1365-2559.2001.01070.x. PMID 11135039.

Anatomy of torso, digestive system: Gastrointestinal tract, excluding mouth (TA A05.3–7, TH H3.04.02-04, GA 11.1141)

Upper GI

Hypo- pharynx	Piriform sinus spaces: Peripharyngeal space Retropharyngeal space Parapharyngeal space Retrovisceral space Retropharyngeal space Danger space Prevertebral space Pterygomandibular raphe Pharyngeal raphe Buccopharyngeal fascia Pharyngobasilar fascia Pharyngeal muscles

Esophagus	UES LES Esophageal glands Serosa / Adventitia Muscular layer Submucosa Mucosa Muscularis mucosa

Stomach	by region: Greater curvature Lesser curvature Angular incisure Cardia Body Fundus Pylorus antrum canal sphincter by layer: Serosa Muscular layer Submucosa Gastric mucosa Muscularis mucosa Gastric rugae Gastric pits Gastric gland Cardiac glands Fundic glands Pyloric glands Goblet cell

Lower GI

Intestine: small

Layers	Serosa Subserosa Muscular layer Circular folds Submucosa Mucosa Muscularis mucosa Peyer's patches Intestinal villus Intestinal gland

Duodenum	Suspensory muscle Major duodenal papilla Minor duodenal papilla Duodenal cap Duodenojejunal flexure Brunner's glands

Jejunum	no substructures

Ileum	Terminal ileum Ileocecal valve

Intestine: large

Layers	Serosa Subserosa Muscular layer Submucosa Mucosa

Cecum	Vermiform appendix

Colon	ascending colon hepatic flexure transverse colon splenic flexure descending colon sigmoid colon continuous taenia coli haustra epiploic appendix

Rectum	Transverse folds of rectum Rectal ampulla

Anal canal	Anal columns Anal valves Anal sinuses Pectinate line Sphincter ani internus muscle Intersphincteric groove Sphincter ani externus muscle Anus

M: DIG

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noco/cong/tumr, sysi/epon

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