Quantification and Clinical Correlation of Posterior Cranial Fossa Cerebrospinal Fluid Volume in Primary Hemifacial Spasm Using Magnetic Resonance Imaging

Primary hemifacial spasm (HFS) is caused by neurovascular conflict (NVC) at the root entry zone of the facial nerve. Whether reduction of posterior cranial fossa (PCF) cerebrospinal fluid (CSF) volume is a risk factor for HFS is not clear. The study aims at the radiologic assessment of PCF CSF volume and its clinical correlation.