Teresa,
I second the Acoustic Neuroma Association recommended by Bob - very good group.
Hearing in the involved ear is often partially compromised because of the tumor and subsequently lost as a result of the surgery. However, there are some professional groups that try to preserve hearing if possible. Intra-operative monitoring of the auditory nerve is done with Auditory Brainstem Response (ABR) equipment. The outcome can be partial rather than complete hearing loss in the involved ear.
The Auditory Nerve travels through the internal auditory canal (IAC) on its way to the auditory cortex portion of the brain. Where the nerve exits the IAC is known as the cerebello-pontine angle (CPA). It is in this area that the tumor usually starts - it may of may not grow into the IAC. The Auditory Nerve (aka the 8th Cranial Nerve) actually has 2 branches - the Auditory Branch and the Vestibular Branch (which innervates the vestibular system to control your sense of balance) - they are in close proximity as they course through the IAC and CPA. The outer covering of the nerve fibers are schwan cells and are the cells affected by the tumor. Sometimes just the vestibular
branch is involved and the tumor is also known as a Vestibular Schwannoma,
sometimes just the auditory branch is involved and sometimes both. The vestibular branch involvement can lead to some disequilibrium and disruption of balance.
Cleveland Clinic, Cleveland - their ENT/Audiology Clinics are great resources.
The House Ear Clinic in Los Angeles pioneered Acoustic Neuroma Surgery and Treatment -
http://www.houseearclinic.com/
They are also a great resource.
Good Luck,
Richard