“…Eleven series published between 1992 and 2011 9,10,12,13,[18][19][20][21][22][23] have reported a mean frequency of 26.3% (16-85%) for biliary calculi among a total of 331 patients, including 143 with symptomatic PCC. Prevalence of both, gallbladder (mean 13.6%, range 0-69%) as well as biliary ductal calculi (mean 17.8%, range 0-77%), is increased and prevalence is much higher in symptomatic PCC, being 60.8% overall in 143 symptomatic patients (35.1% for gallstones, 41.2% for choledocholithiasis).…”