Obesity is a extremely widespread condition in Europe and North America, burdened by a series of complications characterized by major morbidity and morbility. In recent years, bariatric surgery has progressively assumed a leading role in the treatment of morbid obesity and restrictive bariatric surgery procedures, such as laparoscopic vertical sleeve gastrectomy are common.

The aim of the study is to retrospectively determine the value of postoperative CT after LSG as an early tool to identify risk factors for the subsequent development of gastric fistula and enable to stratify postoperative risk in asymptomatic patients and ensure effective management of these risk factors.

Inclusion Criteria:

• adult obese patients with LSG
• BMI ≥ 40 kg/m2 or BMI between 35 and 40 kg/m2
• evidence of obesity related comorbidity
• availability of upper abdomen CT scan with IV and oral contrast medium within 72 hours of surgery

Exclusion Criteria:

• Pregnant women
• allergy to contract medium
• lack of venous access
• patients who did not have a post-surgical upper abdomen CT

Obese patients with BMI ≥ 40 kg/m2 or between 35 e 40 kg/m2 with evidence of obesity related comorbidity