My son had exactly the same problem when he was a baby. This is the doctor who fixed the problem. He is expensive, but he performed excellent surgery, the scar totally dissapeared, and if I remembered correctly, the day surgery took no more than half and hour, no need to stay at the hospital at all.
Dr. David Man
Specialist in Paediatric Surgery
Tel: 28100338
Pager: 82010383
1009 Lane Crawford House
70 Queen's Road Central