A morbidly obese two-year-old Saudi Arabian toddler has been revealed to the youngest person in the world to undergo weight loss surgery.

The toddler weighed 5st 3lbs (33 kg) when surgeons conducted the operation, according to a new report in a medical journal.

The unnamed boy’s legs were bowed under his weight, he was suffering from sleep apnoea that caused him to stop breathing while asleep and attempts to control his weight by dieting had failed. His body mass index was a life-threatening 41.

The doctors conducted a laparoscopic sleeve gastrectomy (LSG) in which they removed an outer layer of stomach to restrict his food intake. Unlike a lap band, the surgery is not reversible.