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Acoustic
Neuroma New Treatment Options Available
for Acoustic Neuroma
A new technique for treating acoustic neuroma
enables neurosurgeons to visualize the facial
nerve pre-surgery, improving the results of
treatment for the benign but difficult-to-reach
tumor. UCLA is among a handful of centers in
the world that is using the technique, known as
facial-nerve tractography.
Acoustic neuroma is a slow-growing tumor that
occurs at the junction of the brain, the nerve
to hearing and the nerve to controlling facial
movement. Its location puts patients at risk for
serious symptoms, which include hearing loss,
ringing in the ears, balance problems and facial
numbness or tingling. The delicate location of the
tumor also makes treatment complex, with risks
that include a weakened facial nerve that leaves
the patient with a crooked smile.
The most recent development is facial-nerve
tractography. UCLA is one of a handful of centers
in the world that is performing this pre-surgical
procedure, which increases precision by enabling
the surgical team to visualize the small, thin facial
nerve ahead of time. “When we weren’t able to see
the facial nerve in advance, we had to guess based
on the most common location. We’ve learned that
the nerve is not always where we expect it to be,”
says Isaac Yang, MD, UCLA neurosurgeon who
specializes in treating acoustic neuroma, which also
is known as vestibular schwannoma. “This allows
us to plan the surgery in a safer, more thoughtful
way so that we can preserve the facial nerve.”
UCLA is also now treating acoustic neuroma
with another minimally invasive method,
radiosurgery. “Treatment of these tumors with
radiation has shown varying levels of success
in preserving patients’ hearing,” Dr. Yang notes.
“The radiosurgery approach is more focused —
stereotactic — targeting just the tumor.” His
group recently completed a study showing that
breaking down the radiosurgery treatment
into multiple small doses increases the safety,
improving hearing outcomes. Within the
next year, Dr. Yang adds, the UCLA Acoustic
Neuroma Program will begin utilizing a new
approach to treating large tumors called adaptive
hybrid surgery — first reducing the tumor size
through conventional surgery and then using
radiosurgery to treat what remains.
These and other minimally invasive treatment
approaches underscore the importance of early
detection, Dr. Yang says. “When the tumor is
smaller, we have more options, and our research
has shown that the smaller the tumor, the better
the outcomes in terms of their facial-nerve
function,” he explains. Acoustic neuroma is most
commonly presented as a one-sided hearing loss,
or ringing in one ear. Patients experiencing such
symptoms should be given an MRI to check for a
tumor, Dr. Yang says.
If a tumor is detected, treatment depends on a host
of factors. “It can be a very personal decision, so
we sit down and talk with the patient about
the most minimally invasive, pain-free way of
treating the tumor,” Dr. Yang explains. “For
a patient who is a musician, hearing may be
everything, while for another patient, the ability
to smile — and thus preservation of the facial
nerve — is most important. If an older patient
has a large tumor, we are likely to take a more
conservative approach, while for a younger
patient we may want to be more aggressive — as
long as we’re not risking the facial nerve.”
For some patients, “minimally invasive” can
mean doing nothing. “If it’s a small acoustic
neuroma that isn’t causing any problems, we may
just follow it — getting MRIs once a year or every
few months to make sure it isn’t pushing against
the brain stem,” Dr. Yang says.
Top: Dr. Isaac Yang operating.
Bottom: High-resolution MRI facial
nerve tractography that visualizes
the course of the facial nerve around
the acoustic neuroma.
The UCLA program’s emphasis on quality-of-life
outcomes represents a departure from the way
acoustic neuroma was treated in the past. “It used
to be that the approach was to get the entire tumor
out at all cost,” Dr. Yang says. “We want to take out
as much as we safely can, as minimally invasively as
we can, while leaving patients with the best possible
quality-of-life outcomes, both in terms of their
hearing and their facial muscles. At the end of every
surgery I want my patients to smile — literally.”
For more information about the UCLA
Acoustic Neuroma Program, go to:
acousticneuroma.ucla.edu 3
UCLA Physicians Update