title: Anterior thalamoperforating artery aneurysm associated with internal carotid artery occlusion: case report.
abstract: OBJECTIVE
  We describe a rare case of a ruptured distal anterior thalamoperforating artery aneurysm associated with right internal carotid artery occlusion.
  
  
  METHODS
  A 59-year-old woman experienced sudden occipital headache, vomiting, and subsequent coma as a result of massive intraventricular hemorrhage. An initial angiogram revealed only an occlusion of the right internal carotid artery just distal to the posterior communicating artery. Repeat angiography 1 month later, however, revealed a saccular aneurysm at a distal anterior thalamoperforating artery in addition to the occlusion of the internal carotid artery.
  
  
  METHODS
  We approached this aneurysm through the right temporal horn after opening the ambient cistern. The aneurysm, which was located in the brain parenchyma just medial to the temporal horn, was successfully resected.
  
  
  CONCLUSIONS
  This rare aneurysm probably developed as a result of hemodynamic stress on the anterior thalamoperforating artery after occlusion of the internal carotid artery and/or secondary to chronic hypertension.
authors.affiliation: Department of Neurosurgery, Uijongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea.
authors.forename: D S
authors.initials: DS
authors.lastname: Kim
authors.forename: D S
authors.initials: DS
authors.lastname: Yoo
authors.forename: P W
authors.initials: PW
authors.lastname: Huh
authors.forename: K S
authors.initials: KS
authors.lastname: Cho
authors.forename: J K
authors.initials: JK
authors.lastname: Kang
mesh_terms: D017542:Aneurysm, Ruptured / Q000000981:diagnostic imaging / Q000601:surgery*; D002343:Carotid Artery, Internal / Q000000981:diagnostic imaging / Q000601:surgery*; D016893:Carotid Stenosis / Q000000981:diagnostic imaging / Q000601:surgery*; D002533:Cerebral Angiography; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging / Q000601:surgery*; D008875:Middle Aged; D011183:Postoperative Complications / Q000000981:diagnostic imaging; D013525:Surgical Instruments; D013788:Thalamus / Q000098:blood supply*