title: Usefulness of MR angiography in detection of persistent trigeminal arteries.
abstract: OBJECTIVE
  To examine the usefulness of magnetic resonance angiography (MRA) in detection of persistent trigeminal arteries (PTA).
  
  
  METHODS
  3D-time-of-flight (TOF)-MRA images obtained from 1100 patients (798 males and 302 females aged 6-75 years with a mean of 55 years) at our and related institutions were examined retrospectively for PTA. The course of the PTA was classified into the posteromedial type and posterolateral type. Charts of the patients were also examined retrospectively for clinical symptoms related to PTA.
  
  
  RESULTS
  PTA was observed in 5 (0.45%) of the 1100 patients, and no aneurysm or arteriovenous malformation was noted in any of these 5 patients. PTA was the posteromedial type in 2 and posterolateral type in 3. PTA was possibly related with clinical symptoms in only 1 patient with oculomotor paresis.
  
  
  CONCLUSIONS
  MRA is useful for non-invasive screening for PTA.
authors.affiliation: Department of Radiology, Tottori University School of Medicine, Yonago, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Suto
authors.forename: Y
authors.initials: Y
authors.lastname: Tokuda
authors.forename: M
authors.initials: M
authors.lastname: Kamba
authors.forename: T
authors.initials: T
authors.lastname: Ogawa
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001159:Arterio-Arterial Fistula / Q000151:congenital* / Q000000981:diagnostic imaging; D001488:Basilar Artery / Q000002:abnormalities* / Q000473:pathology; D002343:Carotid Artery, Internal / Q000002:abnormalities* / Q000473:pathology; D002533:Cerebral Angiography; D002648:Child; D005260:Female; D006801:Humans; D007564:Japan; D018810:Magnetic Resonance Angiography; D008297:Male; D008403:Mass Screening / Q000379:methods / Q000706:statistics & numerical data; D008875:Middle Aged; D012189:Retrospective Studies