May Be Caused by

 Common

Acute appendicitis

Carcinoid

Crohn disease

Iliac artery aneurysm

Intussusception

Meconium ileus

Nodular lymphoid hyperplasia

Normal lymphoid follicles

Ovarian neoplasm

 Uncommon

Actinomycosis

Amebic liver abscess

Backwash ileitis

Diverticulitis

Endometrial implant

Food particles

Gallstone

Histoplasmosis

Hydatid disease

Intramural bowel hemorrhage

Ischemic enteritis

Laxative abuse

Meckel diverticulum

Mesenteric infarction

Radiation enteritis

Tuberculosis

Typhoid fever

Yersinia enterocolitis