Symptoms (I have chronic sinusitis) - dizziness when moving quickly to the left, left facial numbness, left ear feels like there is something behind it. Had an audiologist test and hearing normal and did the dizziness test and all was normal. Saw a specialist and had an MRI. It showed left sided mastoid muscosal thickening, brain lesions on white matter, and what may be a synovial cyst on the left Transmandibular joint. ENT has said the report for the MRI is normal. The symptoms are still there. What else could it be?