Hemifacial Spasm Treated by Microvascular Decompression Through Retrosigmoid Key Hole Approach

Objective To investigate surgical methods and efficacy of microvascular decompression for treatment of hemifacial spasm through retrosigmoid key hole approach.Methods Twelve cases of hemifacial spasm underwent microvascular decompression in our hospital.Postmastoid approach were used.Identified offending vessels firstly,then displaced them away from the root exit zone of facial never by interposing teflon graft between offending vessels and brain stem.The treatment efficacy and complications were recorded in followed up for 3 months.ResultsOffending vessels were identified as anteroinferior cerebellar artery,posteroinferior cerebellar artery or vertebralartery.Spasm symptom disappeared after microvascular decompression in all cases.There left mild tinnitus and auditory acuity decrease in 1 case,mild vertigo in 1 case.No reoccurrence occured.Conclusion Microvascular decompression through retrosigmoid key hole approach had good efficacy in hemifacial spasm treatment,with advantages of high cure rate and less long term complication.