At age 10, Caden Benjamin, from Mpumalanga, South Africa already tips the scales at a whopping 90 kg. He suffers from a rare genetic disorder known as Prader-Willi syndrome, which makes him feel hungry all the time.
Caden was always a hungry child, but his mother, Zola, realized that there was something unusual about his appetite at age 3, when he already weighed 40 kilograms. He took the boy to several doctors, but no one could explain why he was so hungry all the time and gaining so much weight. Finally, a doctor at Steve Biko Academic Hospital in Pretoria ran some tests and diagnosed Caden with Prader-Willi syndrome, an incurable condition that affects about 20 000 people worldwide.