Localization

 gastric Crohn disease (Crohn gastritis)
 intestinal Crohn disease (Crohn enteritis)

• ileal Crohn disease (Crohn ileitis)

 colonic Crohn disease (Crohn colitis)
 rectal Crohn disease (Crohn rectitis)
 anal Crohn disease (Crohn proctitis)

Susceptibility

 Locus IBD1
 Locus IBD2
 Locus IBD3
 Locus IBD4
 Locus IBD5 - 5q31 cytokine gene cluster
 Locus IBD6
 Locus CARD15
 vitamin D receptor gene polymorphism (#10896912#)

References

 Wright CL, Riddell RH. Histology of the stomach and duodenum in Crohn's disease. Am J Surg Pathol. 1998 Apr;22(4):383-90. PMID: #9537465#

 Price AB, Morson BC. Inflammatory bowel disease: the surgical pathology of Crohn's disease and ulcerative colitis. Hum Pathol. 1975 Jan;6(1):7-29. PMID: #1089084#