The third of four brothers diagnosed with a rare life-threatening disease has been allowed home for Christmas after undergoing a transplant.
David Hartley with his sons Daniel, Luke and Nathan (right)
Nathan Hartley, 11, and his brothers Daniel, Joshua and Luke, from Romsey, Hants, suffer from the genetic disorder X-Linked Lymphoproliferative Syndrome.
Their parents were told bone marrow transplants were the only cure.
It was feared Nathan would have to stay in hospital for Christmas after he fell ill with a virus after his transplant.
He had even decorated his hospital room by making festive trimmings as his new immune system fought off Adenovirus, which causes diarrhoea and high temperatures.
But doctors at Great Ormond Street said he was doing so well that he would be home for Christmas and they decided to let him out on his 12th birthday, 15 December.
"The best Christmas present possible for me was the news that Nathan could come home, and coming home on his birthday made it extra special," said David Hartley, 42.
"He has fitted right back into the household. It will be chaos here on Christmas Day. I can't wait."
Matches were found for all four boys after thousands of potential donors responded to a nationwide campaign by the Anthony Nolan Trust.
The three eldest boys have all undergone successful procedures at Great Ormond Street Hospital in London, and Luke is due to have his transplant next year.
Mr Hartley said: "The priorities for the new year for us are to get the three boys healthy and back to school and doing all the normal stuff boys do and to prepare Luke as best we can so that his transplant goes as smoothly as possible."