Figure 10

Figure 10

Gas in the gallbladder. (A) Air fluid level within the gallbladder (black arrow) consistent with a gallbladder empyema. (B) Intramural gas in emphysematous cholecystitis on plain radiograph. Note the difference between gallbladder empyema and emphysematous cholecystitis. (C) Ultrasound confirms gas in the wall of the gallbladder (arrow).