title: Explosion of hydrogen gas in the colon during proctosigmoidoscopy.
mesh_terms: D000368:Aged; D003108:Colonic Diseases / Q000209:etiology*; D004598:Electrosurgery / Q000009:adverse effects; D005107:Explosions; D006801:Humans; D006859:Hydrogen; D007416:Intestinal Perforation / Q000209:etiology*; D008297:Male; D008697:Methane; D011351:Proctoscopy / Q000009:adverse effects; D012812:Sigmoidoscopy / Q000009:adverse effects
chemical_list: D006859:Hydrogen; D008697:Methane