Sagittal Sinus

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My 17 year old son has suffered from a non-ceasing headache for over two years.  We have seen doctors, been to the mayo clinic etc.  We went and saw a new doctor this summer who ordered a MRV.  The radiology reports states that the left sagittal sinus is either diminutive and atretic or thrombosed.  Our neurologist here wants to talk to the doctor who ordered the test who happens to be on vacation.  Our doctor told us it could be nothing or maybe we are getting somewhere.  He had two spinal taps over two year ago.  The opening pressure on the first was 23.  The second one done while he was on topamax was 11.  He has had his eyes checked two years ago and they didn't see any pressure.  Not alot of info out there on this and I am having a hard time having to wait for this doctor to get back from his vacation.  They diagnosed him with New Daily Persisitent Headache this summer.  Any information would be helpful.

[Dr_Nassim]

Fine your information you gave me lastly were very helpfull to me, to diagnose on the web is to re-answer predicted answers at once...
anyways rule out now   CHIARI malformation !!
D r Nassim

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Dr. Dr:

He was on topamax for almost  two years.  He had terrible side effects.  He is 5'10 and weighs a 120 on a good day.  They called and are going to do a CT venogram today.  They were also talking about putting him on Diamox.  His blood pressure is always low.  92/58.

[Dr_Nassim]

give him Topiramate 100 mg 1 tab  evening
But start with lower doses
Please tell me what is his weight,Height and Blood pressure