On this episode of Body Bizarre - can doctors diagnose the mystery condition destroying a man's life? The young woman battling a rare disorder that means she can't stop eating. The teenager trapped in the body of a 90-year-old. And can surgery save the little girl with a giant tumour?

Laisha, eight, from Texas, is just 70cm tall and has an incredibly rare form of dwarfism. She travels to a region of Ecuador where hundreds of people have the same condition.