Collagenous Colitis, also known as colitis, collagenous, is related to colitis and bowel dysfunction. An important gene associated with Collagenous Colitis is NOS2 (Nitric Oxide Synthase 2), and among its related pathways/superpathways are Sertoli-Sertoli Cell Junction Dynamics and NF-kappaB Signaling. The drugs Rifaximin and Budesonide have been mentioned in the context of this disorder. Affiliated tissues include colon and small intestine, and related phenotypes are homeostasis/metabolism and neoplasm