title: Fusiform aneurysm of a persistent trigeminal artery.
abstract: OBJECTIVE
  Fusiform aneurysms of the persistent trigeminal artery are rare and endovascular treatment of these aneurysms has not been attempted previously. We describe a case of persistent trigeminal artery with a fusiform aneurysm in its middle third, managed using Guglielmi detachable coils (GDC).
  
  
  METHODS
  A 50-year-old, diabetic and hypertensive patient presented with sudden onset headache and neck stiffness. On examination, she was conscious but disoriented, without cranial nerve or sensorimotor deficits. Four-vessel cerebral digital subtraction angiography revealed a fusiform aneurysm of the middle third of a persistent trigeminal artery on the left side with adult type posterior cerebral arteries.
  
  
  METHODS
  Guglielmi detachable coils were used for occlusion of the persistent trigeminal artery.
  
  
  RESULTS
  The procedure was well tolerated but delayed ischemic neurological deficits developed due to vasospasm.
  
  
  CONCLUSIONS
  (1) In spite of angiographically documented independence of the anterior and posterior cerebral circulation, occlusion of a persistent trigeminal artery using endovascular techniques may result in posterior circulation stroke due to a number of factors, including occlusion of brainstem perforators taking origin from the persistent trigeminal artery or vasospasm. (2) The timing for endovascular intervention following aneurysmal rupture remains poorly defined.
authors.affiliation: Department of Neurosurgery, All India Institute of Medical Sciences, New Delhi, India.
authors.forename: D
authors.initials: D
authors.lastname: Agrawal
authors.forename: A K
authors.initials: AK
authors.lastname: Mahapatra
authors.forename: N K
authors.initials: NK
authors.lastname: Mishra
mesh_terms: D002533:Cerebral Angiography / Q000379:methods; D003920:Diabetes Mellitus; D004621:Embolization, Therapeutic / Q000295:instrumentation; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging / Q000628:therapy*; D008279:Magnetic Resonance Imaging / Q000379:methods; D008875:Middle Aged; D013345:Subarachnoid Hemorrhage / Q000000981:diagnostic imaging / Q000628:therapy*