[The lost gallstone--complication after laparoscopic cholecystectomy].

In this case report a persisting fistula between the right flexure of the colon and the abdominal wall was observed after a laparoscopic cholecystectomy. This was caused by a lost gallstone and eventually resulted in the resection of a colon segment. As a consequence of this case it can be said that intra-abdominally lost gallstones--especially larger ones--have to be recovered completely. In risky cholecystectomies we should consider the use of a laparoscopic bag or the installation of additional working cannulas.