Rare Case of Ulnar Nerve Tumor: Intraneural Ganglious Cyst

Relevance. Differential diagnostics of volumetric formations of peripheral nerves and their semiotics using magnetic resonance imaging is one of the most complex sections in neurosurgery. A rare cause of compression-ischemic neuropathy of peripheral nerves are intraneural ganglionic cysts. Case descriptions. The manuscript presents a rare case of an intraneural ganglion cyst of the ulnar nerve, which caused compression-ischemic neuropathy of the ulnar nerve with a lesion level in the cubital canal. After a detailed comprehensive clinical and instrumental examination, preoperative planning was carried out. Given the presence of a clear dissection plane, the use of microsurgical techniques made it possible to perform total tumor removal without compromising the integrity of the ulnar nerve with complete regression of compression-ischemic neuropathy. An intraneural ganglion cyst was histologically confirmed. Conclusion. If clinical manifestations of compression-ischemic neuropathy of the ulnar nerve at the level of the cubital canal are detected in a patient, in addition to ultrasound examination and electroneuromyography, magnetic resonance imaging is necessary to exclude a space-occupying formation in this area. Microsurgical removal of a ganglion cyst is a highly effective treatment method that allows you to preserve the integrity of the peripheral nerve and its sheaths, as well as achieve complete regression of symptoms.