Hyperplastic colonic polyp

Medium power view of a hyperplastic colonic polyp shows a serrated surface contour and marked luminal infolding of the crypt epithelium.

Low (left) and high (right) power views of a biopsy of a normal colon. Low power reveals straight crypts and mild lamina propria mononuclear cell infiltration. High power shows the surface enterocytes with interspersed goblet cells (arrows).