title: Rectal biopsies from the by-passed rectum.
mesh_terms: D001706:Biopsy; D003082:Colectomy; D003093:Colitis, Ulcerative / Q000601:surgery*; D003424:Crohn Disease / Q000601:surgery*; D006801:Humans; D007081:Ileostomy; D012007:Rectum / Q000473:pathology*