Collagenous Colitis (high power-Trichrome)

Collagenous Colitis (high power-Trichrome) •The Trichrome preparation stains collagen blue highlighting the subepithelial collagen deposition which gives this disease its name •The overlying epithelium shows marked degeneration of the surface columnar cells and has an inflammatory infiltrate of lymphocytes and polys •The lamina propria contains increased numbers of mononuclear cells (Description By:Martin Nadel, M.D. ) (Image Contrib. by:Martin Nadel, M.D. UCHC )