BJR -- Zissin et al. 76 (902): 137 Figure 2

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Figure 2. An 81-year-old with acute cholecystitis. Contrast enhanced CT shows a "sandwich-like" thickening of the gallbladder wall, representing hypodense submucosal oedema surrounded by an inner layer of enhancing mucosa (arrow) and an outer layer of enhancing serosa (arrowhead).