title: Hemifacial spasm associated with a cerebellopontine angle arachnoid cyst in a young adult.
abstract: There are no reported cases of hemifacial spasm associated with an arachnoid cyst in the literature. We report the first case of hemifacial spasm with an ipsilateral cerebellopontine angle arachnoid cyst in a 25-year-old man. The patient underwent evacuation of the arachnoid cyst by a partial membranectomy without any beneficial effect, and finally got rid of the hemifacial spasm by reexploration and microvascular decompression of the facial nerve. The operative findings and results revealed that the cyst produced deviation of the ipsilateral posterior inferior cerebellar artery, which was secondarily in contact with the root exit zone of the facial nerve.
authors.affiliation: Department of Neurosurgery, School of Medicine, Kanazawa University, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Higashi
authors.forename: J
authors.initials: J
authors.lastname: Yamashita
authors.forename: Y
authors.initials: Y
authors.lastname: Yamamoto
authors.forename: K
authors.initials: K
authors.lastname: Izumi
mesh_terms: D000328:Adult; D016080:Arachnoid Cysts / Q000150:complications* / Q000000981:diagnostic imaging / Q000473:pathology; D002530:Cerebellopontine Angle / Q000000981:diagnostic imaging* / Q000473:pathology; D005152:Facial Muscles / Q000000981:diagnostic imaging / Q000473:pathology; D006801:Humans; D008297:Male; D011859:Radiography; D013035:Spasm / Q000000981:diagnostic imaging / Q000209:etiology* / Q000473:pathology