title: Side predilections of offending arteries in hemifacial spasm.
abstract: The side predilections of various offending arteries in hemifacial spasm (HFS) have not been well studied. The relationship between clinical and radiological features of HFS and offending arteries were investigated in the present study. A retrospective analysis of 370 patients who underwent microvascular decompression for HFS was performed. The patients were divided into four groups based on the offending arteries, namely anterior inferior cerebellar artery (AICA), posterior inferior cerebellar artery (PICA), vertebral artery, and multiple offending arteries. Affected side, age at onset, presence of hypertension, and sigmoid sinus area and dominance were compared between groups. The mean age of patients with a left HFS was significantly greater than that of patients with a right HFS (P=0.009). The AICA affected primarily the right side and PICA and multiple offending arteries the left side (P<0.001). Side of sigmoid sinus dominance was significantly different among groups (P<0.001). The offending arteries in HFS may be related to these differences. AICA was associated with right-sided symptoms, younger age at onset, and presence of left dominant sigmoid sinus, while PICA was associated with left-sided symptoms, older age at onset, and smaller right sigmoid sinus area.
authors.affiliation: Department of Neurosurgery, Incheon St. Mary's Hospital The Catholic University of Korea, #56 Dongsuro Bupyeong-Gu, Incheon 403-720, South Korea.
authors.forename: Moonyoung
authors.initials: M
authors.lastname: Chung
authors.affiliation: Department of Neurosurgery, Bundang CHA University Hospital, Seongnam, South Korea.
authors.forename: Inbo
authors.initials: I
authors.lastname: Han
authors.affiliation: Department of Neurosurgery, Bundang CHA University Hospital, Seongnam, South Korea.
authors.forename: Sang-Sup
authors.initials: SS
authors.lastname: Chung
authors.affiliation: Department of Neurosurgery, Incheon St. Mary's Hospital The Catholic University of Korea, #56 Dongsuro Bupyeong-Gu, Incheon 403-720, South Korea. Electronic address: hrnsd@catholic.ac.kr.
authors.forename: Ryoong
authors.initials: R
authors.lastname: Huh
mesh_terms: D000367:Age Factors; D017668:Age of Onset; D000368:Aged; D002531:Cerebellum / Q000098:blood supply* / Q000000981:diagnostic imaging*; D002536:Cerebral Arteries / Q000000981:diagnostic imaging* / Q000601:surgery*; D002560:Cerebrovascular Circulation; D003392:Cranial Sinuses / Q000000981:diagnostic imaging; D005260:Female; D007839:Functional Laterality; D019569:Hemifacial Spasm / Q000000981:diagnostic imaging* / Q000601:surgery*; D006801:Humans; D018810:Magnetic Resonance Angiography; D008297:Male; D061145:Microvascular Decompression Surgery; D008875:Middle Aged; D012189:Retrospective Studies; D014711:Vertebral Artery / Q000000981:diagnostic imaging / Q000601:surgery
keywords: Cerebellar arteries; Hemifacial spasm; Laterality; Sigmoid sinus