title: [Neuroendoscopic treatment of different types of quadrigeminal cistern arachnoid cysts].
abstract: OBJECTIVE
  To evaluate the method, strategy and efficacy of treating different types of quadrigeminal cistern arachnoid cysts (QCAC) with neuroendoscope.
  
  
  METHODS
  A retrospective analysis was conducted for 12 QCAC patients with obstructive hydrocephalus. They were classified into 3 types and underwent neuroendoscopic operation at our hospital between November 2005 and November 2009. Their surgical approaches, complications and efficacy were analyzed. The mean age of first diagnosis was 3.7 years old. There were 7 type II cases and 5 type III cases with a varying level of symptoms. The follow-up period was 6 - 24 months. Cine-MRI (magnetic resonance imaging) examination was performed both preoperatively and post-operatively.
  
  
  RESULTS
  Among them, 12 patients recovered well without any occurrence of hemorrhage, paralysis, lower cranial nerve injury, cerebrospinal fluid leakage, infection or death. Subdural effusion occurred in 3 cases, but disappeared within 6 months. Seven feverish cases recovered after a symptomatic treatment. The shapes of cysts and ventricles almost returned to a normal level in 8 cases. Three cases of arachnoid cyst had a slight change.
  
  
  CONCLUSIONS
  In accordance with the QCAC patient types, different neuroendoscopic approaches can fully reconstruct the cerebrospinal fluid circulation. And the use of frameless navigation makes it more precise and safe.
authors.affiliation: Department of Neurosurgery, Affiliated Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, China. neuro7@163.com
authors.forename: Zhi-Qiang
authors.initials: ZQ
authors.lastname: Hu
authors.forename: Bin
authors.initials: B
authors.lastname: Dai
authors.forename: Hui
authors.initials: H
authors.lastname: Huang
authors.forename: Guang-Tong
authors.initials: GT
authors.lastname: Zhu
authors.forename: Feng
authors.initials: F
authors.lastname: Guan
authors.forename: Bei-Bei
authors.initials: BB
authors.lastname: Mao
authors.forename: Shao-Heng
authors.initials: SH
authors.lastname: Wang
authors.forename: Zhuang
authors.initials: Z
authors.lastname: Kang
mesh_terms: D000293:Adolescent; D016080:Arachnoid Cysts / Q000145:classification* / Q000601:surgery*; D002648:Child; D002675:Child, Preschool; D003399:Craniotomy / Q000379:methods; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D044583:Neuroendoscopy / Q000379:methods*; D012189:Retrospective Studies; D003336:Tectum Mesencephali