title: A new retractor for rectal biopsy.
mesh_terms: D001706:Biopsy / Q000295:instrumentation*; D003107:Colorectal Surgery / Q000295:instrumentation*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008531:Megacolon / Q000175:diagnosis; D012007:Rectum / Q000601:surgery; D013525:Surgical Instruments