May Be Caused by

 Common

Carcinoma

Diverticulitis

Fecal impaction

Fecal mass

Ileal prolapse

Intussusception

Pericolic abscess

Polyp

 Uncommon

Abdominal neoplasm

Adhesions

Amebic liver abscess

Ameboma

Amyloidoma

Appendiceal abscess

Ascaris bolus anisakiasis

Bezoar

Carcinoid

Colonic varix

Crohn disease

Cyst

Endometrioma

Extramedullary plasmacytoma

Fibrous band

Food particle

Gallstone

Gastrointestinal stromal tumor

Giant type pseudopolyp

Helminthoma

Hemangioma

Hemorrhoid

Hydatid disease

Intramural bowel hemorrhage

Inverted colonic diverticulum

Kaposi sarcoma

Leiomyoma

Lipoma

Metastasis

Mucormycoma

Pseudotumor

Sarcoma

Schistosomal granuloma

Solitary rectal ulcer syndrome

Surgical anastomosis

Suture granuloma

Taeniae coli

Tuberculoma

Villous adenoma