Bariatric surgery in adolescents: a long-term follow-up study.

Background: The benefits of bariatric surgery in adult obese patients are well known, but data are lacking regarding the outcome of the surgery in adolescents. The aim of this study was to retrospectively assess the operative morbidity and mortality, percentage of loss of initial excess weight, and the incidence of long-term complications and reoperations in a cohort of obese patients who underwent biliopancreatic diversion (BPD) before their 18th birthday.

Methods: A total of 76 adolescent subjects underwent BPD between 1976 and 2005. Of these 78 patients, 7 had Prader-Willi syndrome and 1 had Turner syndrome and were excluded from the study.

Results: The patient population comprised 52 girls and 16 boys. Their mean age was 16.8 years, mean body weight at operation was 125 kg (mean body mass index 46 kg/m2). Operative mortality was nil. The mean follow-up was 11 years (range 2-23). The mean percentage of loss of initial excess weight at each patient's longest follow-up was 78%. Before surgery, 33 patients were hypertensive (49%), 11 were dyslipidemic (16%), 3 were hyperglycemic, and 2 had type 2 diabetes. At the longest follow-up period after surgery, only 6 patients were hypertensive, and none were dyslipidemic or diabetic. A total of 19 reoperations were performed in 14 patients (20%), including 7 revisions. Eleven patients developed protein malnutrition 1-10 years after BPD. The long-term mortality rate was 4%. At 4 to 23 years after BPD, 18 of the women had given birth to 28 healthy babies. Three women had had a complicated pregnancy.

Conclusion: Adolescents can undergo malabsorptive bariatric surgery with excellent long-term weight loss results and an incidence of long-term complications similar to that observed during the 30-year evolution of BPD in our experience.