title: Spontaneous resolution of an isolated cervical anterior spinal artery aneurysm after subarachnoid hemorrhage.
abstract: BACKGROUND
  Isolated cervical anterior spinal artery aneurysms are extremely rare. Subarachnoid hemorrhage (SAH) secondary to such lesions have been described only in six cases to the best of our knowledge.
  
  
  METHODS
  We describe an unusual clinical picture of SAH due to rupture of anterior spinal artery aneurysm in a patient with previous normal angiogram. Due to the location of the aneurysm and clinical status of the patient, conservative management was proposed, and she was discharged to further follow-up. Monthly routine angiograms revealed resolution of the aneurysm 90 days after bleeding, which was highly suggestive of vascular dissection.
  
  
  CONCLUSIONS
  We highlight the need to consider these aneurysms in the differential diagnosis of SAH, especially when occurring in the posterior fossa and when angiography findings are inconclusive.
authors.affiliation: Department of Neurosurgery, Hospital do Servidor Público Estadual de São Paulo, IAMSPE, São Paulo, Brazil.
authors.forename: Felix Hendrik
authors.initials: FH
authors.lastname: Pahl
authors.affiliation: Department of Neurosurgery, Hospital do Servidor Público Estadual de São Paulo, IAMSPE, São Paulo, Brazil.
authors.forename: Matheus Fernandes
authors.initials: MF
authors.lastname: de Oliveira
authors.affiliation: Department of Neurosurgery, Hospital do Servidor Público Estadual de São Paulo, IAMSPE, São Paulo, Brazil.
authors.forename: Marcus Alexandre Cavalcanti
authors.initials: MA
authors.lastname: Rotta
authors.affiliation: Department of Neurosurgery, Hospital do Servidor Público Estadual de São Paulo, IAMSPE, São Paulo, Brazil.
authors.forename: Guilherme Marcos Soares
authors.initials: GM
authors.lastname: Dias
authors.affiliation: Department of Neurosurgery, Hospital do Servidor Público Estadual de São Paulo, IAMSPE, São Paulo, Brazil.
authors.forename: André Luiz
authors.initials: AL
authors.lastname: Rezende
authors.affiliation: Department of Neurosurgery, Hospital do Servidor Público Estadual de São Paulo, IAMSPE, São Paulo, Brazil.
authors.forename: José Marcus
authors.initials: JM
authors.lastname: Rotta
keywords: Diagnosis; intracranial aneurysm; treatment