On this episode of Body Bizarre - the woman fighting a life-threatening tumour in her eye; can surgeons straighten the legs of a woman born with backward knees? A man with no limbs lives a fulfilling life against the odds; and can doctors remove a two-year-old Nepali boy's extra arm?

Arun, from India, has four legs, with the second pair growing from his back. He travels to Delhi to seek an operation, but will doctors be able to help and will his family agree?