Baseline BMI is a strong predictor of nadir BMI after adolescent gastric bypass.

Objective: Surgical treatment of extreme obesity may be appropriate for some adolescents. We hypothesized that surgical weight loss outcomes may differ by preoperative level of extreme obesity (body mass index [BMI] > or=99th percentile).

Study Design: A longitudinal assessment of clinical characteristics from 61 adolescents who underwent laparoscopic Roux-en-Y gastric bypass at a single pediatric center from 2002 until 2007 was performed.

Preferential loss of central (trunk) adiposity in adolescents and young adults after laparoscopic gastric bypass.

Background: An increasing number of young people are developing severe obesity with adult-like co-morbidities and undergoing bariatric surgery. Although a number of studies have described major weight loss after bariatric surgery, none have examined the proportions of lean body and fat mass lost or the potentially more important issue of changes in regional fat mass distribution after laparoscopic gastric bypass surgery.

Methods: Five morbidly obese females (mean age 18) were evaluated by standard anthropometric measures and dual energy x-ray absorptiometry at baseline and 1 year after bariatric surgery.