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Fig. 1A —62-year-old woman with recurrent right upper quadrant pain 2
years after laparoscopic cholecystectomy. No cystic duct was identified on
pathologic examination of specimen obtained at laparoscopic cholecystectomy.
Oblique sagittal sonogram shows round echogenic lesion with posterior acoustic
shadowing (arrow) in saccular anechoic structure in gallbladder
fossa, posterior to multiple linear echogenic lesions with shadowing
(arrowheads). These findings suggest diagnosis of retained stone in
remnant gallbladder.