- May 16, 2017
- 3,754
- Tinnitus Since
- 04/2011
- Cause of Tinnitus
- Syringing + Somatic tinnitus from dental work
Yes, MRI shows vascular occlusion. Not dangerous as MRI and radiologist would have noted. A tumor would had been seen by MRI at onset - time of test - so no worries.I did an MRI of the head about 3 years ago. It showed an artery that was close to the hearing nerve on my right side, which is the same side I have the hum. Do you think my hum could be caused by this? The MRI was taken 2,5 years before the hum appeared, so things might possibly have worsened since then. I don't have any blood pressure issues as far as I know.
Can an artery pressing against the hearing nerve be fixed?
Loops of the anterior inferior cerebellar artery in the cerebellopontine angle are found frequently during anatomic studies of this region. Surgery is needed to separate the vascular loop from the eighth cranial nerve - hearing nerve, but only recommended if the hum is bothersome and constant. Furosemide may help - I would consider this.
A battery of audiometric and vestibular system test results need to be done to confirm prominent vascular loops in the internal auditory canal diagnosed by CT or MRI. I believe data reports state one-third have abnormal caloric tests, but spontaneous nystagmus is always detected by photoelectric nystagmography. The loop exerts pressure on the nerve, and the nerve compromises inner ear circulation causing the hum.
Eighth nerve and vascular loops produce similar symptoms, but a cochlear type of hearing loss with good speech discrimination and normal caloric testing should raise suspicion of a vascular loop. I doubt that you have other lesions of the cerebellopontine angle, otherwise you would have vertigo and be dizzy.
@FGG - thoughts.