Hyalinizing cholecystitis is a rare type of chronic cholecystitis. Moderate patchy transmural especially perivascular lymphoplasmacytic inflammatory cell infiltration is observed in the gallbladder wall. We present the 18F-FDG PET/CT and MRI findings of this rare subtype of chronic cholecystitis. Hyalinizing cholecystitis should be kept in mind in the differential diagnosis of gallbladder wall thickening with intense 18F-FDG uptake.
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