disease has location disease has inflammation site Crohn ileitis Crohn disease colitis ileocolitis https://www.malacards.org/card/ileocolitis EFO:0005624 UMLS:C0949272 MEDGEN:184943 Ileocolitis or ileal Crohn's is the most common type of Crohn's disease. It affects both the ileum (small intestine) and the colon. MedDRA:10062647 DOID:0060190 NANDO:1200447 MONDO:0005534 colon ileum