High power view of a colonic biopsy from a patient with collagenous colitis. There is a thickened subepithelial collagenous band (arrow) associated with increased mononuclear cell infiltration and epithelial degeneration.
Courtesy of Robert Odze, MD.
Graphic 60570 Version 1.0
Normal colon
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).
