Prior to every operation, a valid consent is sighted and checked before patient undergoes anaesthesia. In turn, informed consent would have been obtained well before the operative date, during rooms consultation.
The reasoning for a surgical recommendation, the pros, cons, expected outcome, possible complications, and the alternative choices would have been discussed. Please do not hold back from contacting the office if you wish to discuss further, clarify points, allay concerns, or even change your mind. Dr Yeung will ring back when he has free time, usually at the end of the day.