I would say to go with your gut feeling -maybe tell him that you are going to wait and consider doing those things later. Leave the door open, but don't do them now if you don't think it is necessary.
Unfortunately, I think that specialists sometimes start looking for *anything* else that might be wrong once they have addressed the original issue, not out of malice, but just because they want to be thorough.
Also, sometimes things are recommended because they want to rule them out, so that the patient, or patient's parents, don't come back later and say "you didn't tell me such and such…"
