May Be Caused by

 Common

Artifactual colon filling defect

Familial adenomatous polyposis

Normal lymphoid follicles

Polyps

Pseudopolyps

 Uncommon

Amebomas

Amyloidosis

Ascaris

Bannayan-Riley-Ruvalcaba syndrome

Colitis

Colitis cystica profunda

Cowden syndrome

Cronkhite-Canada syndrome

Cystic fibrosis

Endometriosis

Gardner syndrome

Hemangiomatosis

Hemorrhoids

Intraluminal parasites

Juvenile polyposis

Kaposi sarcoma

Leukemic infiltration

Lipomatous polyposis

Liver metastasis

Lymphoma

Malacoplakia

Multiple carcinomas

Neurofibromatosis

Nodular lymphoid hyperplasia

Peutz-Jeghers syndrome

Pneumatosis cystoides intestinalis

Polyposis syndrome

Schistosomiasis

Trichuris

Turcot syndrome

Urticaria of colon

Varices