Prophylactic cholecystectomy, a mandatory step in morbidly obese patients undergoing laparoscopic Roux-en-Y gastric bypass?

Background: The aim of this study was to determine the incidence of symptomatic gallstone disease requiring cholecystectomy (CCE) after laparoscopic Roux-en-Y gastric bypass (LRYGBP) and to identify the peri-operative risk factors associated with postoperative symptomatic gallstone disease.
Methods: Between August 2003 and November 2009, 724 patients underwent LRYGBP at the Groeninge Hospital. Preoperative ultrasound was performed in 600 of 641 patients without history of CCE and 120 (20.0%) were diagnosed with cholecystolithiasis.
Result: Six hundred twenty-five patients were included, 43(6.9%) developed delayed symptoms related to biliary disease. Of these 43 patients, 39 underwent post-LRYGBP CCE. Of these 39 patients, 9 (7.5%) had a positive ultrasound prior to LRYGBP. Multivariate analysis identified weight loss at 3 months post-LRYGB of more than 50% of excess weight [HR (95% CI), 2.04 (1.04-4.28); p = 0.037) as the sole significant independent predictor of delayed symptomatic cholecystolithiasis.
Conclusions: Symptomatic gallstone disease occurred only in 6.9% of patients post-LRYGBP. Multivariate analysis identified weight loss at 3 months post-LRYGBP of more than 50% of excess weight as the sole significant independent predictor of delayed symptomatic cholecystolithiasis. Prophylactic CCE should not be recommended at the time of LRYGBP.