Magnetic resonance imaging (MRI) has many advantages compared to other examination methods, such as an opportunity of multiplane research, absence of ionizing radiation, absence of artifacts from bone structures. With the help of modern MRI devices and special software it is possible to get information not only about the tissues surrounding the tumor, but also about nerve structures.
MRI  helps to estimate anatomic and topographic ratios of nerve trunks, large vessels and surrounding tissues, to solve the problems of differential diagnostics, including, detection of space occupying lesion and to offer histological structure of the tumor.
Using MRI we can determine a location of the mass, its influence on a nerve trunk, its extent, to compare the pathologically changed sites with opposite intact sites. In practice it is very convenient to use software with fat signal suppression in order to improve the quality of visualization [8,10,11].
MRI of peripheral nerves alongside with the results of clinical-neurological and electrophysiological methods of examination helps to make the diagnosis more specific, to find indications and contra-indications for surgical treatment, to select the optimum access and volume of surgical intervention.
Conclusion: In order to make a right diagnosis and define the indications, treatment tactics in patients with peripheral nerve tumors at preoperation stage, it is necessary to carry out the flowing actions:
1. Clinical and neurological examination.
3. Ultrasonic examination.
4. Magnetic resonance tomography.
1. Bersnev V.P. Classic electric diagnostics and determination of "intensity - duration" curve at nerve injuries // Guidelines. - L., 1974. - 23 pages.
2. Grigorovich K. A. About diagnostics and surgical treatment of spinal nerves neurinomas // Surgery theory and practice. - Proceedings of LSGMI. - Т. 57. - L., I960. Pages 308-319.