Laparoscopic sleeve gastrectomy( vertical sleeve gastrectomy ) is a procedure in which about ¾ of the stomach is removed leaving a narrow gastric tube or “sleeve” through which food passes. The removed part of the stomach includes fundus; which is the balloon like upper part of stomach which easily stretches with food. Stomach Fundus is also important as it releases hormone Ghrelin .This hormone is termed as ‘hunger hormone’ because it stimulates appetite, increases food intake and promotes fat storage. Due to this small stomach tube, the amount of food ingested is restricted and a person can take small amount of food at a time thereby the amount of calories consumed is restricted which results in weight loss.