title: Shifting intramural gas--a new ultrasound sign of emphysematous cholecystitis.
mesh_terms: D000208:Acute Disease; D000368:Aged; D001424:Bacterial Infections; D002764:Cholecystitis / Q000175:diagnosis* / Q000503:physiopathology; D005704:Gallbladder / Q000503:physiopathology*; D005740:Gases; D006801:Humans; D008297:Male; D014463:Ultrasonography
chemical_list: D005740:Gases