Just wondering what to expect

ok, so i havnt actually even seen anyone, RE: my son, conor's diagnosis.they phoned the results to me.i know very little and im really scared.i found a neurosurgeon at OSU and im gonna go there with him ASAP.what are the most important things to bring up and questions i should ask?his is 6 mm. flow is good rt. now but does or can this chg.?last yr. he had horrible stomach issues.bleeding ulcer with 3 seperate hospitalizations,appendectomy,3 transfusions all within 2 mths.to make matters worse,he has depression anxiety ODD OCD and migraines.from what im reading,it seems these may all be related.oh and the leg movements and strange sensations as well have affected him.just wondering what to think of all this