title: Subdural hematoma of the posterior fossa due to posterior communicating artery aneurysm rupture.
abstract: BACKGROUND
  We describe an unusual presentation of a ruptured aneurysm of the posterior communicating artery with an acute subdural hematoma (SDH) located in the posterior fossa. We also reviewed the literature, focusing on the location of this intracranial hematoma.
  
  
  METHODS
  An 83-year-old woman was admitted to our institution with recent sudden headache and dizziness. Magnetic resonance imaging showed a thin collection of blood in the subdural space adjacent to the clivus, along the wall of the posterior fossa, and at the cervical spine level. A right posterior communicating artery aneurysm was diagnosed using computed tomography angiography and digital subtraction angiography. The aneurysm had two lobes, one of which was attached to the right dorsum sellae. The aneurysm was occluded by stent-assisted coil embolization. The patient was discharged 3 weeks after admission with absence of neurological deficit.
  
  
  CONCLUSIONS
  A ruptured aneurysm of the posterior communicating artery may cause an acute SDH.
authors.affiliation: Department of Neurosurgery, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea.
authors.forename: Myoung Soo
authors.initials: MS
authors.lastname: Kim
authors.forename: Jong Rak
authors.initials: JR
authors.lastname: Jung
authors.forename: Sang Won
authors.initials: SW
authors.lastname: Yoon
authors.forename: Chae Heuck
authors.initials: CH
authors.lastname: Lee