title: Endoscopic treatment of a fourth ventricle arachnoid cyst via the third ventricle: a case report.
abstract: BACKGROUND
  Arachnoid cysts within the fourth ventricle have rarely been reported in the literature. Different procedures have been performed to restore a normal cerebrospinal fluid dynamic or pressure, including shunting and partial or complete excision of the cyst by open microsurgery. Cerebrospinal fluid shunts give only partial improvement of symptoms and are prone to malfunctions. The microsurgical excision of the cyst seems to offer the best chance of success.
  
  
  METHODS
  We report the case of a fourth ventricle arachnoid cyst successfully treated with a complete endoscopic cerebral procedure via the third ventricle.
  
  
  CONCLUSIONS
  Endoscopic fenestration of fourth ventricle arachnoid cysts may be considered an effective neurosurgical treatment.
authors.affiliation: IRCCS Institute of Neurological Sciences of Bologna, *Departments of Neurosurgery and ‡Neuroradiology, Bellaria Hospital, Bologna, Italy.
authors.forename: Matteo
authors.initials: M
authors.lastname: Martinoni
authors.forename: Francesco
authors.initials: F
authors.lastname: Toni
authors.forename: Mariella
authors.initials: M
authors.lastname: Lefosse
authors.forename: Eugenio
authors.initials: E
authors.lastname: Pozzati
authors.forename: Anna Federica
authors.initials: AF
authors.lastname: Marliani
authors.forename: Carmelo
authors.initials: C
authors.lastname: Mascari
mesh_terms: D000328:Adult; D016080:Arachnoid Cysts / Q000601:surgery*; D004724:Endoscopy / Q000379:methods*; D005260:Female; D020546:Fourth Ventricle / Q000601:surgery*; D006801:Humans; D008279:Magnetic Resonance Imaging; D019635:Neurosurgical Procedures