Large posterior fossa meningioma presenting with hemifacial spasm.

ABSTRACT: Hemifacial spasms are involuntary paroxysmal muscle contractions commonly presenting as unilateral involvement of the orbicularis oculi and oris muscles. A 62-year-old woman presented with spasms of progressively increasing frequency for 2 months in the right orbicularis oculi muscle, with subsequent involvement of the orbicularis oris muscle. Cerebral magnetic resonance imaging revealed an intensely enhanced dural-based tumor in the right posterior fossa. On constructive interference in steady-state (CISS) imaging, the right cerebellopontine angle cistern showed marked narrowing, and the right facial nerve could not be identified. The patient underwent tumor resection in the prone position, with intraoperative abnormal muscle response (AMR) monitoring. Upon tumor resection, the late varia

SUBMITTER: Asagiri H 

PROVIDER: S-EPMC12361662 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature