Abstract
To assess the pathological basis of the changes seen on ultrasound examination of the gallbladder wall in cholecystitis, the appearances of the gallbladder wall were analysed in 17 patients with acute cholecystitis and 27 patients with chronic cholecystitis, and correlated with the pathological specimens removed at surgery. A thin echo reduced layer within the echogenic gallbladder wall corresponds to a complex of subserosal oedema, haemorrhage and inflammatory cell infiltration, or to muscular hypertrophy. Indistinctness or a low echogenicity rind along the inner margin represents mucosal sloughing or obliteration of the mucosal folds. Uniformly decreased echogenicity of the wall is caused by severe inflammatory change with sloughing of the mucosa or obliteration of the mucosal folds. These ultrasound signs are considered to be valuable signs of cholecystitis.
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