title: Unexpected ruptured aneurysm during posterior fossa surgery.
abstract: BACKGROUND
  Surgery is the recommended treatment for unique significant cerebellar metastasis, particularly in cases of hydrocephalus. Complications of posterior fossa surgery are associated with high risk of morbidity and mortality. We present a unique case of unexpected peroperative rupture of a cerebellar superior artery aneurysm during posterior fossa surgery.
  
  
  METHODS
  During posterior cranial fossa surgery, severe arterial bleeding occurred in front of the medulla oblongata. Immediate postoperative computed tomographic (CT) angiography revealed a fusiform aneurysm from a distal branch of the left superior cerebellar artery.
  
  
  CONCLUSIONS
  To our knowledge, this is the first reported operative case of unexpected infratentorial ruptured aneurysm during posterior fossa surgery.
authors.affiliation: Department of Neurosurgery, Amiens Nord Hospital, Jules Verne University, France. Electronic address: louis.chenin@neurochirurgie.fr.
authors.forename: L
authors.initials: L
authors.lastname: Chenin
authors.affiliation: Department of Neurosurgery, Amiens Nord Hospital, Jules Verne University, France.
authors.forename: C
authors.initials: C
authors.lastname: Capel
authors.affiliation: Department of Neurosurgery, Amiens Nord Hospital, Jules Verne University, France.
authors.forename: H
authors.initials: H
authors.lastname: N'Da
authors.affiliation: Department of Neurosurgery, Amiens Nord Hospital, Jules Verne University, France.
authors.forename: M
authors.initials: M
authors.lastname: Lefranc
authors.affiliation: Department of Neurosurgery, Amiens Nord Hospital, Jules Verne University, France.
authors.forename: J
authors.initials: J
authors.lastname: Peltier
mesh_terms: D017542:Aneurysm, Ruptured / Q000175:diagnosis / Q000209:etiology / Q000601:surgery*; D002531:Cerebellum; D002533:Cerebral Angiography / Q000379:methods; D002536:Cerebral Arteries / Q000601:surgery*; D002543:Cerebral Hemorrhage / Q000209:etiology / Q000601:surgery*; D005260:Female; D006801:Humans; D006849:Hydrocephalus / Q000175:diagnosis / Q000601:surgery*; D002532:Intracranial Aneurysm / Q000175:diagnosis / Q000601:surgery*; D008875:Middle Aged; D014057:Tomography, X-Ray Computed / Q000379:methods; D016896:Treatment Outcome
keywords: Aneurysm; Anévrisme; Artère cérébelleuse supérieure; Cerebellar metastasis; Complication peropératoire; Fosse cérébrale postérieure; Métastase cérébelleuse; Peroperative complication; Posterior fossa surgery; Superior cerebellar artery