Neurovascular сompression syndromes of posterior fossa structures in combination with Chiari malformation

Abstract

The results of clinical and MRI investigation as to the peculiarities of posterior cranii fossa (PCF) parameters, appropriate for the small PCF and frequency of Chiari malformation in 220 patients with neurovascular compression syndrome (trigeminal and glossopharyngeal neuralgie, hemifacial spasm, Meniere’s syndrome, essential paroxysmal arterial hypertention) are presented. The surgical tactics in neurovascular compression syndrome combined with Chiari malformation are discussed. Decompression of craniocervical conduct simultaneously with microvascular decompression (MVD) surgery were performed in 7 patients. MVD was performed in 2 patients followed by PCF because of growing signs of tonsillar herniation. PCF decompression was performed in 2 patients before MVD. Only craniocervical conduct showed resolution of trigeminal neuralgia without MVD surgery in one case. Signs of cerebellar herniation have been resolved in all 12 patients after craniocervical conduct decompression, like signs of cranial nerves compression after MVD.