Collagenous Colitis (high power)
Collagenous Colitis (high power)

Subepithelial eosinophilic accelular collagenous deposits
Normal surface columnar epithelium shows flattening, is partly lifted off, and has a lymphocytic infiltrate
(Description By:Martin Nadel, M.D. )
(Image Contrib. by:Martin Nadel, M.D. UCHC )