IG Akustikusneurinom (IGAN)

Themed platform providing diagnostic, treatment, research etc. information
Opportunity to interact with fellow sufferers, doctors…

Links

Diagnostic investigations

Various acoustic and balance tests provide doctors with the first indications of the condition. It is possible, for example, to measure the reaction of hair cells to acoustic stimuli. Tomographic procedures provide more accurate diagnoses and facilitate planning of treatment. Magnetic resonance imaging (MRI) has advantages over computer tomography (CT), in particular when it comes to detecting smaller tumours. The use of contrast agents is essential in both procedures. The documentation is particularly successful with coronal investigatory sections, which are images of layers from head to toe and parallel to the face.

 

Hearing test

The BERA findings (comparison between left and right ears) for an acoustic neuroma patient are depicted on the left. While the healthy (right) side displays potentials with normal latency, the left wave V latencies are drastically prolonged. Wave I shows on the contrary a near normal latency. When, as in this example, the "I-V inter-peak latency" is more than 4.6 milliseconds, the findings indicate a retro-cochlear location for the disturbance. The lead cannot show the I wave if the space-occupying lesion is large. Furthermore, in the case of retro cochlear disruptions, BERA potentials are not showen with the lead until well over the tone audiometric auditory threshold.

Guidelines

---

IG Akustikusneurinom (IGAN)

Postbox | CH-6330 Cham | Tel. +41 41 785 51 82 | Fax +41 41 785 56 09
www.akustikusneurinom.ch | info@akustikusneurinom.ch