What Does The Following MRI Report Indicate?
No reason for concern.
Detailed Answer:
I read your question carefully and I understand your concern.
The falx is situated between the two brain hemispheres, is a thick the fold of the brain meninges, the layers covering the brain.
A meningioma is a benign tumor originating from these layers covering the brain. It is a very slowly growing tumor, may remain unchanged for years. It is very common especially as we age it can be found in many people. Often it causes no symptoms and is found by coincidence as in your case. If symptomatic the most common manifestation are seizures.
In your case at 12 mm it is a small meningioma. It is not related to the hearing loss and as it is not causing any symptoms it doesn't need any treatment. It may be followed by control MRIs to check for possible growth, first after one year and if unchanged every couple of years.
I remain at your disposal for other questions.