May Be Caused by

 Common

Candida albicans

Crohn disease

Cryptosporidium

Cytomegalovirus infection

Giardiasis

Hookworm disease

Hydatid disease

Intestinal capillariasis

Multiple endocrine neoplasia syndrome

Mycobacterium avium-intercellulare

Opportunistic infection

Peptic ulcer

Schistosomiasis

Strongyloidiasis

Zollinger-Ellison syndrome

 Uncommon

A-beta-lipoproteinemia

Alpha chain disease

Amyloidosis

Campylobacter fetus

Campylobacter jejuni

Cystic fibrosis

E. coli

Enterocolitis

Eosinophilic enteritis

Histoplasmosis

Interloop abscess

Intestinal lymphangiectasia

Mastocytosis

Ménétrier disease

Pancreatitis

Pseudolymphoma

Radiation injury

Shigella

Tuberculous enteritis

Tuberculous peritonitis

Typhoid fever

Vibrio

Waldenström macroglobulinemia

Whipple disease