Collagenous Colitis (medium power)

Collagenous Colitis (medium power) •Subepithelial eosinophilic accelular fibrotic change(arrow) •Overlying epithelium is flattened and irregular with focal lymphocytic infiltrates and some degenerative change •Moderate increase in lymphocytes within the lamina propria •The crypts are intact but show some lymphocytic infiltrate without crypt degeneration (Description By:Martin Nadel, M.D. ) (Image Contrib. by:Martin Nadel, M.D. UCHC )