Collagenous colitis.
D003092:Colitis / Q000150:complications / Q000473:pathology*; D003094:Collagen / Q000032:analysis; D012809:Colon, Sigmoid / Q000473:pathology*; D003967:Diarrhea / Q000209:etiology; D006801:Humans; D007413:Intestinal Mucosa / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D012007:Rectum / Q000473:pathology*
D003094:Collagen