My son is 12 diagnosed with autism age 18 months and last year we thought he was having siezures but turns out to be a motor tic disorder(his head nods/jerks forward) also after an mri they found excessive csf behind both his optic nerves neuro opth said looks ok he does see it but no headaches and pressure seems perfect poss from a fall when he was a year old. Now about 2 years ago a noticed a bump or peteussion on his lower spine. Went to ortho said mild mild case of scoliosis but didnt see anything on xray of spine prob prominent in that area. This summer looked as it has the last two years but all of a sudden this last week or so it is bigger more prominant under his skin deep btw but seems over his spine. Going to see a neurosurgeon what should i be asking what kinds of tests i want to be a little pushy at this point i waited two years while monitoring like a was asked but now i am concerned, i see my son rubbing it he says it itches( but again he may using the wrong language and maybe not lol). I have very good insurance and i pay to have it so how do i approach this? Any ideas on what it may be?