Early gallstone recurrence rate after successful shock-wave therapy.

Extracorporeal shock-wave lithotripsy combined with adjuvant bile-acid dissolution therapy results in complete clearance of stone fragments in a high percentage of selected patients with radiolucent gallbladder calculi. With the gallbladder in situ, these patients are at risk of stone recurrence. Therefore, the early rate of stone recurrence after successful lithotripsy was evaluated. Fifty-eight of the first 60 consecutive patients who became stone free underwent follow-up examinations at least 1 yr (range, 12-37 mo; mean +/- SD, 18 +/- 6) after discontinuation of adjuvant bile-acid therapy. Five patients reported recurrent biliary pain within 1 yr after lithotripsy, and recurrent gallstones were detected. Fifty-three patients were asymptomatic during the first yr, and no recurrence was detected. Thus, the rate of gallstone recurrence was 9% within 1 yr. The rate of gallstone recurrence up to 3 yr was estimated by actuarial analysis. The probability of stone recurrence was 11% (+/- 4%) at 1.5 yr, and no further increase was observed up to 3 yr. Gallstone recurrence within 1 yr after successful shock-wave therapy has to be expected in approximately the same percentage of patients as has been reported in earlier postdissolution trials. It causes recurrent biliary pain in most cases.