My BB is also same as your baby. He will undergo this surgery in this month at St. Teresa Hospital. I find Dr. Koo who is a 兒童外科 (好似). We are going to see him again in the following week.
I'm working in a medical company for 外科產品, I can say, if for peadiatric surgery, there's one in PWH (Prince of Wales) who is the best in peadiatric urology, alternatively, there's another one in Central Building Pedder Street, also specialize in peadiatric urology, pls PM me if you want more info.