Cap polyposis: A rare cause of rectal bleeding in children

Figure 1 Colonoscopy images of 2 patients with cap polyposis. A: Colonoscopy image of a patient showing multiple small sessile polypoid lesions with mucous exudates of cap polyposis (CP) in the rectum; B: Colonoscopy image of a patient showing a single sessile red polypoid lesion located on the transverse folds with normal intervening mucosa.

Figure 2 Histology of a sessile colonic polyp from a patient with cap polyposis. The polyp was comprised of granulation tissue and focally distended crypts with a slightly serrated luminal surface. Surface ulceration with fibrino-mucoid exudates was also present.