Nihal Bitla from Mumbai, India, is an unusual teenager, he weighs 12.5kg and is under 1.2 m (4 ft) in height. His body is that of an elderly man, with wrinkled leathery skin, a bald enlarged head and withered limbs.
And it's all because of an extremely rare genetic disorder called Hutchinson-Gilford Progeria Syndrome that occurrs in 1 per 8 million live births.
The disorder makes his body age eight times faster than normal, while he remains young. He has genetic predisposition to atherosclerosis, kidney failure, loss of eyesight, and heart problems. Those born with progeria typically live to their mid teens to early twenties.
He currently loves painting, playing computer games and with his toys, but in the upcoming years he may not be able to carry out his hobbies.
His mind will remain young, but his body will age and his health will deteriorate.
Nihal has already stopped going to school, after his classmates began teasing him. They called him Auro, a progeria patient played by Indian actor Amitabh Bachchan in the Bollywood movie Paa.
When a fellow student told him he too would suffer a heart attack like Auro did in the movie, upset Nihal refused to go back.
He is currently undergoing clinical trials at the Progeria Research Foundation in Boston, for a cancer drug that doctors hope will slow the ageing process. However, medics don't give any guarantee that his life expectancy will be lengthened.
His family say he has a kind, gentle nature and gets on well with his two healthy siblings, sister Sonu, 11, and a brother Lucky, 4.
Now, he says he has three wishes in his life; to meet ASIMO The Robot made by Honda in Japan; to go to Disneyland in California and another secret wish he says he will reveal later in his life.
His father now desperately wants to make his son's potentially last years memorable. He said: "No matter how much time is left, I just want to try to fulfil my son's wishes for now."