<prompt> Histological finding of solitary rectal ulcer syndrome is:Thick collagen band under endothelial layerIntraepithelial collection of lymphocytesCrypt hypoplasiaIncreased muscle layer proliferation  <response>: Mucosal prolapse syndrome solitary rectal ulcer syndrome dt chronic mechanical stimulation Recognized in prolapsing colostomies, inflammatory polyps, solitary ulcer or prolapsing hemorrhoid at the site of rectum - Microscopically, there is Intercryptal erosion, hyperplasia of crypts some have peculiar diamond shape. Obliteration of lamina propria by fibroblasts, elastin smooth muscle cells from muscularis mucosae Reduction in number of lymphocytes plasma cells Thickening of the muscularis mucosa with splaying of its fibers. 