title: Endoscopic treatment of convexity arachnoid cysts.
abstract: OBJECTIVE
  The aim of this study was to investigate the endoscopic treatment of cerebral hemisphere convexity arachnoid cyst.
  
  
  METHODS
  Eight cases of hemisphere convexity arachnoid cyst treated with cyst-ventricular or cisternal endoscopic approach in September 2007 to March 2011 were retrospectively recruited. The clinical symptoms, radiological findings, surgical indications, surgical approach, complications, and follow-up studies were analyzed.
  
  
  RESULTS
  All patients showed convexity arachnoid cysts adjacent to the ventricles or cisternal. After treatment, all patients showed decrease in size of the cysts (100 %), with preoperative symptoms disappeared in six patients and improved in two cases. In one case, postoperative subdural effusion was found without symptoms reported.
  
  
  CONCLUSIONS
  Endoscopic surgery is ideal for treatment of arachnoid cysts adjacent to the ventricles or cisternal.
authors.affiliation: Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing 100050, China.
authors.forename: Songbai
authors.initials: S
authors.lastname: Gui
authors.forename: Xuyi
authors.initials: X
authors.lastname: Zong
authors.forename: Chuzhong
authors.initials: C
authors.lastname: Li
authors.forename: Yazhuo
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D000293:Adolescent; D000328:Adult; D016080:Arachnoid Cysts / Q000601:surgery*; D002552:Cerebral Ventricles; D002648:Child; D002675:Child, Preschool; D002946:Cisterna Magna; D004724:Endoscopy / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D019635:Neurosurgical Procedures / Q000295:instrumentation / Q000379:methods*; D016896:Treatment Outcome; D055815:Young Adult