My wife (who has an acoustic neuroma) recently pointed me to new research showing that tumor necrosis factor (TNF) alpha, secreted due to the presence of an acoustic neuroma, is closely and positively correlated with loss of hearing. In other words, while the growth of a tumor and resulting pressure on the auditory nerve may affect hearing, it is apparently well known that the facts don't bear this out: many people with small ANs are deaf in one ear, and many people with large ANs hear just fine. The authors show that it is the TNF that is causing the most dramatic loss of hearing. (In other words, the body's own immune response).
In that article, the researchers mention an apparently well-known fact that bevacizumab, a monoclonal antibody used for decreasing tumor size in NF2 patients, also works to improve hearing in NF2 patients, while corticosteroids have been used to improve hearing in non-NF2 patients (those with the more common acoustic neuromas) with "sudden" hearing loss for reasons that were, up to now, unknown.
The authors go on to describe their research that shows WHY bevacizumab and corticosteroids, would work to improve hearing in patients with ANs who were experiencing "sudden" hearing loss. It is apparently because they are working against the TNF. (TNF is inflammatory, and corticosteroids are anti-inflammatory).
My question is, has anyone else heard about corticosteroids being used to improve hearing in both AN patients? It was never mentioned to us as even a vague possibility by any doctor, and we have not seen it mentioned anywhere else.
Here is the article:
http://www.nature.com/articles/srep18599#f2-Cristi