common bile duct stones from 59 consecutive patients who underwent cholecystectomy more than 1 year before radiological detection of choledocholithiasis ( group i ) and from 31 consecutive patients with choledocholithiasis and gallbladder in situ ( group ii ) were subjected to chemical analysis and compared with the composition of gallbladder stones from the same population ( two consecutive biopsy and autopsy series , n = 343 ) .
C0008320
cholecystectomy
C0016976
gallbladder