Obesity affects 3%-4% of the pediatric population and leads to cardiac mortality during adult life. Bariatric surgery is the best treatment for weight loss and preventing obesity associated comorbidities in adults, but its applications and safety are yet to be defined for adolescents.

Since 2008, in France, certain university hospitals have been eligible to perform bariatric surgery for adolescents. It was therfore possible to define its feasibility, potential complications and specific indications.

This led to recommandations published by Health Authorities (HAS) in 2016. However, it seems imperative to continue monitoring these patients in order to improve their management, especially as the use of these surgical techniques becomes increasingly widespread.

The Angers University Hospital is one of the leading hospitals when it comes bariatric surgery for adolescents through its use of gastric bands.

The aim of this protocol is to update data on how effective this surgery is on weight loss and obesity-associated comorbidities, and to monitor medical, psychological and surgical complications associated with this treatment.

Inclusion Criteria:

• Patients aged 14-20 years of age and asking for bariatric surgery
• BMI >= 40 Kg.m-2 or >= 35 Kg.m-2 with major obesity-related comorbidities (hypertension, diabetes, sleep apnea, etc...)

Exclusion Criteria:

• An unstable psychiatric disorder
• Bariatric surgery anesthesic contraindications
• Having not completed a minimum of six months of the pre operative program
• Lack of consent from the patient or the patient's relatives.

Pediatric patients treated in our hospital for morbid obesity (BMI >= 35 Kg.M-2) through different programs with lifestyle and nutritional interventions and, for those who requested it, the possibility of bariatric surgery.