Gallbladder Fossa Abscess Masquerading As Cholecystitis Post Cholecystectomy

Abstract

We present a case of a 59-year-old female, status-post cholecystectomy, found to have an abscess within the gallbladder fossa. A hepatobiliary scan utilizing technetium 99m-DISIDA demonstrated a characteristic ‘rim sign’; a photopenic defect surrounded by a rim of mildly increased activity immediately adjacent to the gallbladder fossa. The ‘rim sign’ visualized is thought to be the result of reactive inflammatory findings in the hepatic tissue adjacent to a postoperative abscess within the gallbladder fossa.