Portal vein thrombosis in laparoscopic vertical gastrectomy - laparoscopic sleeve gastrectomy: a case series.

Grade III obesity is defined as excessive accumulation of fat in the body in a person with a BMI>40kg/m and is related to a series of comorbidities. It is therefore of fundamental importance that appropriate treatment is adopted to reduce its harmful effects on health. Laparoscopic vertical gastrectomy is well-established for treatment of grade III obesity.