I recently experienced a sudden hearing loss which I had thought was temporary and from wax in my ear. My GP said my eardrum was dull and referred me to an ENT. After my initial consultation with the ENT, he had me see the autiologist on his staff who had me take a hearing test and did a test called an ABR which she told me measures the signal from the auditory nerve to the brainstem. After these two tests the ENT said I need to go for an MRI but not why. A friend of mine told me that a dull eardrum can be an indication of a tumor and that the ENT is probably looking for one, or to rule out one via the MRI. Is she right?