title: Acute emphysematous cholecystitis: an ultrasonic diagnosis.
mesh_terms: D000208:Acute Disease; D002764:Cholecystitis / Q000175:diagnosis*; D003015:Clostridium Infections / Q000175:diagnosis*; D003016:Clostridium perfringens / Q000302:isolation & purification; D005260:Female; D006801:Humans; D008875:Middle Aged; D014463:Ultrasonography