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IgM

immunoglobulin M.

IGRA

interferon gamma release assay.

IH

infectious hepatitis.

IHC

immunohistochemistry.

IHS

Indian Health Service.

IIHI

individually identifiable health information.

IIV

inactivated influenza virus vaccine.

IL

(ī′ĕl′) interleukin.

ILD

interstitial lung disorder.

ile

isoleucine.

ilea

(il′ē-ă) Pl. of ileum.

ileac

(il′ē-ak) 1. Ileal. 2. Pert. to the ileus.

ileal

(il′ē-ăl) [ileum + -ac] Pert. to the ileum. SYN: ileac.

ileal conduit

SEE: under conduit.

ileal pouch anal anastomosis

A reservoir constructed in the terminal ileum of patients who have undergone colectomy, designed to create fecal continence. The pouch may be sewn or stapled together in a J-, W-, or S-shape. The procedure is complicated by inflammation (“pouchitis”) in about 50% or by stricture formation in about 10% of patients.

ileitis

(il″ē-īt′ĭs) [ileum + -itis] Inflammation of the ileum. The most common cause is Crohn disease. SEE: Crohn disease; inflammatory bowel disease.

 SYMPTOMS: Patients may have pain in the right lower quadrant of the abdomen, often with diarrhea, nausea, vomiting, weight loss, and fevers. The stool may contain pus, blood, or mucus.

backwash i. Ileitis in which the contents of the colon flow backward into the last segment of the small intestine. It can occur in ulcerative colitis and is a risk factor for colon cancer.

regional i. Crohn disease.

ileo-, ile-

[L. ile, ileum, ilium, pl. ilia, area of the abdomen from the lowest rib to the pubes; flank, groin] Prefixes meaning ileum. Ileo- and ile- usually refer to the last part of the small intestine (ileum). SEE: ilio-.

ileocecal

(il′ē-ō-se′kăl) [ileo- + cecal] Pert. to the ileum and cecum.

ileocecostomy

(ĭl″ē-ō-sē-kŏs′tō-mē) [″ + ″ + Gr. stoma, opening] The surgical formation of an opening between the ileum and cecum.

ileocolic

(il″ē-ō-kol′ik) [ileo- + colic (2)] Pert. to the ileum and colon.

ileocolitis

(ĭl″ē-ō-kō-lī′tĭs) [″ + ″ + itis, inflammation] Inflammatory bowel disease.

ileocolonoscopy

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