Arteriovenous malformation in the cerebellopontine angle presenting as hemifacial spasm--case report.
A 64-year-old female was admitted with a 6-year history of right hemifacial spasm. Neurological examination and precontrast computed tomographic (CT) scanning showed no abnormality. Vertebral angiography disclosed, however, a small arteriovenous malformation (AVM) in the right cerebellopontine angle. A postcontrast CT scan demonstrated a high-density area in the right cerebellomedullary junction which appeared as a flow-void signal on magnetic resonance images. A right retromastoid craniectomy was performed to separate an enlarged and tortuous loop of the right anterior inferior cerebellar artery from the right facial nerve using a Teflon-felt sheet. The AVM was not excised. Postoperatively, she was completely free of hemifacial spasm.
Kim
Y
Y
Department of Neurosurgery, Fukuoka University, Chikushi Hospital, Chikushino, Japan.
Tanaka
A
A
Kimura
M
M
Yoshinaga
S
S
Tomonaga
M
M
D002530:Cerebellopontine Angle; D002533:Cerebral Angiography; D005152:Facial Muscles; D005260:Female; D006801:Humans; D002538:Intracranial Arteriovenous Malformations / Q000150:complications* / Q000000981:diagnostic imaging / Q000601:surgery; D008875:Middle Aged; D013035:Spasm / Q000209:etiology* / Q000601:surgery; D014057:Tomography, X-Ray Computed