title: Endoscopic management of quadrigeminal arachnoid cysts.
abstract: OBJECTIVE
  Quadrigeminal cistern arachnoid cysts are rare lesions, accounting for 5% to 10% of all intracranial arachnoid cysts and 9% of all supratentorial localizations. We reviewed the patients with quadrigeminal arachnoid cyst (QAC) who were treated with neuroendoscopic intervention.
  
  
  METHODS
  Seventeen patients with QAC had been operated on between 2000 and 2007 in our institution. Four patients had undergone shunting prior to neuroendoscopic surgery. There were nine girls and seven boys with age ranging from 7 days to 17 years (mean, 40 months). All patients had hydrocephalus. A wide ventriculocystostomy (VC) and endoscopic third ventriculostomy were performed by using rigid neuroendoscopes. An aqueductal stent was also placed in two of the patients. Psychometric evaluation was administered postoperatively when possible. Follow-up of the patients ranged from 6 to 96 months (mean, 51.8 months).
  
  
  RESULTS
  Of the 17 patients, 12 underwent endoscopic procedure as the primary surgery. Five patients had been previously shunted. Macrocrania and psychomotor retardation were the main symptom and sign in all infants with QAC. Older children presented with the symptoms and signs of intracranial hypertension. Of the eight patients who were 6 months old or younger, only one did not need a ventriculo-peritoneal (VP) shunt. Endoscopic procedures were successful in all patients older than 6 months of age (P=0.005).
  
  
  CONCLUSIONS
  The patients presenting in their infancy had a psychomotor retardation, and all patients except for one, younger than 6 months of age, needed a VP shunt. Neuroendoscopic procedure is effective particularly in the patients with QAC older than 6 months of age.
authors.affiliation: Division of Pediatric Neurosurgery, Faculty of Medicine, Ege University, Bornova, Izmir 35100, Turkey. yusuf.ersahin@ege.edu.tr
authors.forename: Yusuf
authors.initials: Y
authors.lastname: Erşahin
authors.forename: Hande
authors.initials: H
authors.lastname: Kesikçi
mesh_terms: D000293:Adolescent; D000367:Age Factors; D016080:Arachnoid Cysts / Q000150:complications* / Q000601:surgery*; D002648:Child; D002675:Child, Preschool; D003072:Cognition Disorders / Q000209:etiology / Q000503:physiopathology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D006849:Hydrocephalus / Q000209:etiology / Q000473:pathology / Q000601:surgery*; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D044583:Neuroendoscopy / Q000379:methods; D019635:Neurosurgical Procedures / Q000379:methods; D011379:Prognosis; D011597:Psychomotor Performance; D016896:Treatment Outcome; D017287:Ventriculoperitoneal Shunt / Q000379:methods; D014696:Ventriculostomy / Q000379:methods