The mother of a boy born with a rare and crippling condition has launched a worldwide search for doctors' opinions and advice in the faint hope he can be cured. Five-month-old Li Chun-hei has been diagnosed with CHARGE Syndrome - multiple birth defects affecting the eyes, ears, heart, genitals and brain. About one in 10,000 children have the condition. Chun-hei was born on October 31 at Princess Margaret Hospital and was quickly found to have difficulty feeding and to be virtually blind. At three months he was found to be almost completely deaf. 'I almost collapsed when I learned he is deaf too. I am completely lost as to how such a boy could learn about this world?' said his mother, 30-year-old Apple Chan Woon-cheung. Ms Chan was desperate to know what had happened to her son and what cures, if any, there were for him. Her sister helped her set up a webpage to tell others about her son's condition in the hope experts could offer some advice. In the past month she has received more than 100 e-mails and phone calls, including some from doctors in Hong Kong and the United States. Most of these experts have said there could be no cure as long as the syndrome's causes were not fully known. Ms Chan had regular checkups at Prince Margaret Hospital during her pregnancy, including regular ultrasound scans. When she was four months pregnant, a scan found there was only one artery, instead of two, in the umbilical cord. She was told this would have no impact on the health of her baby. Ms Chan said had the hospital explained more about her situation, she might have been better prepared to accept her son's disabilities. A spokeswoman for the hospital yesterday said there was no direct relationship between the absence of an umbilical artery and his condition at birth. 'The hospital provided the necessary pre-natal assessment for Chun-hei's mother during her pregnancy ... The mother had also been kept informed of the situation of the foetus,' she said.