Acalculous Cholecystitis Diagnosis
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The usual finding on imaging studies is a distended acalculous gallbladder with thickened walls (>3-4 mm) with or without pericholecystic fluid. Acalculous cholecystitis can be observed in patients with human immunodeficiency virus (HIV) infection, although it is a late manifestation of this disease. Acalculous cholecystitis can also be found in patients on total parenteral nutrition (TPN), typically those on TPN for more than three months.