I cannot comment on your imaging findings based on your text, and without seeing the images, therefore I cannot tell you what the white spots are.
A CSF leak develops most of the time in the setting of previous head trauma or basal skull fracture - in this case a chronic fluid leak can develop. I do not know if this is consistent with your case. If there is low pressure in the CSF system causing headaches, this can be evaluted by doign a spinal tap and measuring the CSF pressure.
Other tests such as a cisternogram sa you are doing or a nuclear medicine test can help aid in the diagnosis. Measuring the sodium, and glucose content of the fluid from the ear or nose can help differentiate it from just nasal/serous secretions.
Good luck
Maybe try the allergy route while looking into a leak? Can't hurt.
Could this be a very bad case of sinusitis / mastoiditis?
Time
I'm wondering if you headaches and pressure were caused by exercise or a neck strain at all? Do you also feel more lethargic after you hear these fluids? Recently I've started thinking the majority of my headaches and other symptoms were all due to torn muscles in my neck. At the time, it certainly didn't feel that way.
Just wondering where exactly you hear the fluids? What does it sound like? Does the sound only last a second or do fluids seem to slosh around all the time?
Where is the pressure and how long have you had the problem for?
Do you have any neck issues or feel vertigo at all? Are you lethargic, can you hear your pulse in your head? Anything like that...
MRI's are frustrating. Doctors depend on them to be the final diagnosis for someone who is either fit and healthy or seriously ill. My MRI came up normal and I suffered 4 months because my neuro diagnosed me with anxiety. My new neuro looked into it more and although he couldn't find anything we tried some medications (Epilim) and I'm feeling so much better.
Epilim is meant to help people with epilepsy but it also assists with muscle problems and blood flow issues in the head (although its not licensed? for that). Maybe you should ask about it... takes about 4 days to kick in. I'm on a very small dosage. one in morning, one at night.
Hoping though my test after the holidays shows somehting.
It started a couple years ago after a sinus infection. (been to doctor after doctor) Odd though each test I have taken (did mention this I think) each radiologist reports somehting different dont know how when my head doesnt change. I truly belive I am being missdiagonosed.