Bariatric surgery leads to marked and long-lasting weight reduction .
A large proportion of patients undergoing bariatric surgery have DM2 .
Glycemic control improves in the months after laparoscopic adjustable gastric b and ing , but it improves more rapidly and completely after laparoscopic Roux-en-Y gastric bypass surgery .
Thus , both types of surgery are capable of improving or even curing DM2 , but the mechanisms may differ
OBJECTIVE To systematic ally review the literature pertaining to the reversal of  type 2 diabetes mellitus ( DM2 ) after Roux-en-Y gastric bypass and adjustable gastric b and ing .
Preoperative weight loss with a very-low-energy diet: quantitation of changes in liver and abdominal fat by serial imaging.
BACKGROUND A very-low-energy diet ( VLED ) can result in substantial , rapid weight loss and is increasingly prescribed before obesity surgery to minimize risk and difficulty by reducing liver size and abdominal adiposity . Despite its growing popularity , a VLED in this setting has received little attention . OBJECTIVE The aim of this study was to investigate the efficacy and acceptability of a preoperative VLED . DESIGN In a prospect i ve observational study , 32 subjects ( n = 19 men and 13 women ) with a mean ( + /-SD ) age of 47.5 + /- 8.3 y and a body mass index ( in kg/m(2 ) ) of 47.3 + /- 5.3 consumed a VLED for 12 wk . Primary outcomes included changes in liver volume ( LV ) and in visceral and subcutaneous adipose tissue ( VAT/SAT ) . Changes in body weight , anthropometric measures , and biochemical variables were also recorded , and compliance with , acceptability of , and side effects of treatment were assessed . Changes in LV and VAT/SAT area were measured by computed tomography and magnetic resonance imaging at baseline and weeks 2 , 4 , 8 , and 12 . RESULTS Mean ( + /-SD ) LV , VAT/SAT , and body weight decreased significantly ( P < 0.001 for all ) . The degree of LV reduction was directly related to the reduction in relative body weight ( r = 0.54 , P = 0.001 ) and initial LV ( r = 0.43 , P = 0.015 ) . Eighty percent of the reduction in LV occurred between weeks 0 and 2 ( P < 0.001 ) . Reductions in body weight and VAT were uniform over the 12-wk period . Attrition was 14 % . Acceptability was adequate but waned over time , and mild transitory side effects occurred . CONCLUSIONS Given the observed early reduction in LV and the progressive reduction in VAT , we suggest that the minimum duration for a preoperative VLED be 2 wk . Ideally , the duration should be 6 wk to achieve maximal LV reduction and significant reductions in VAT and body weight without compromising compliance and acceptability
Bariatric surgery leads to marked and long-lasting weight reduction .
A large proportion of patients undergoing bariatric surgery have DM2 .
Glycemic control improves in the months after laparoscopic adjustable gastric b and ing , but it improves more rapidly and completely after laparoscopic Roux-en-Y gastric bypass surgery .
Thus , both types of surgery are capable of improving or even curing DM2 , but the mechanisms may differ
OBJECTIVE To systematic ally review the literature pertaining to the reversal of  type 2 diabetes mellitus ( DM2 ) after Roux-en-Y gastric bypass and adjustable gastric b and ing .