title: Retroperitoneal fibrosis, regional enteritis, and carcinoid tumors.
mesh_terms: D002276:Carcinoid Tumor / Q000150:complications*; D003424:Crohn Disease / Q000150:complications*; D006801:Humans; D012185:Retroperitoneal Fibrosis / Q000150:complications*; D012701:Serotonin
chemical_list: D012701:Serotonin