Nearly 50 % of our patients had either experienced gallstones before LRYGB or developed gallstones after LRYGB. In the group with new gallstone development, 50 % required emergency cholecystectomy. These results, together with the reported better quality of life after a combined procedure and the reported economic benefits, support the use of concomitant prophylactic cholecystectomy in patients undergoing LRYGB.
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