May Be Caused by

 Common

Crohn disease

Diverticulitis

Ischemic colitis

Ulcerative colitis

 Uncommon

Amebic liver abscess

Amyloidosis

Angioneurotic edema

Carcinoid syndrome

Clostridium difficile colitis

Cytomegalovirus colitis

Endometriosis

Hemolytic-uremic syndrome

Hydatid disease

Intramural bowel hemorrhage

Kaposi sarcoma

Mural metastasis

Necrotizing colitis

Pericolic abscess

Peritoneal metastasis

Pneumatosis cystoides intestinalis

Retractile mesenteritis

Toxic megacolon

Tuberculosis

Typhlitis

Urticaria of colon