title: Pediatric interhemispheric arachnoid cyst: An institutional experience.
abstract: BACKGROUND
  Interhemispheric arachnoid cysts (IHACs) are a rare type of congenital arachnoid cyst accounting for <5% of all cases. The optimum surgical management of symptomatic IHAC is still controversial, and there are no clear guidelines.
  
  
  METHODS
  Retrospective analysis of six pediatric patients of IHAC operated from 2012 to 2015 at our institute. There was definitive sex predisposition with all patients being males. Endoscopic cystoventriculostomy, cystocisternostomy, and cystoperitoneal shunt surgeries were performed in three patients each.
  
  
  RESULTS
  The median age at presentation was 13 months. The most common clinical presentations were macrocrania with rapidly increasing head size, seizures, infantile spasms, and developmental delay. The mean duration of follow-up was 24.16 months (range: 3-36 months). Cyst size decreased in all the patients on follow-up imaging. Head size stabilized in all the patients. None of the patients required a second surgical procedure till the last follow-up.
  
  
  CONCLUSIONS
  Both endoscopic cyst fenestration and shunt surgery are safe and effective in management of IHAC.
authors.affiliation: Department of Neurosurgery, All India Institute of Medical Sciences, New Delhi, India.
authors.forename: Dipanker Singh
authors.initials: DS
authors.lastname: Mankotia
authors.affiliation: Department of Neurosurgery, All India Institute of Medical Sciences, New Delhi, India.
authors.forename: Hardik
authors.initials: H
authors.lastname: Sardana
authors.affiliation: Department of Neurosurgery, All India Institute of Medical Sciences, New Delhi, India.
authors.forename: Sumit
authors.initials: S
authors.lastname: Sinha
authors.affiliation: Department of Neurosurgery, All India Institute of Medical Sciences, New Delhi, India.
authors.forename: Bhawani Shankar
authors.initials: BS
authors.lastname: Sharma
authors.affiliation: Department of Neurosurgery, All India Institute of Medical Sciences, New Delhi, India.
authors.forename: Ashish
authors.initials: A
authors.lastname: Suri
authors.affiliation: Department of Neurosurgery, All India Institute of Medical Sciences, New Delhi, India.
authors.forename: Sachin Anil
authors.initials: SA
authors.lastname: Borkar
authors.affiliation: Department of Neurosurgery, All India Institute of Medical Sciences, New Delhi, India.
authors.forename: Guru Dutta
authors.initials: GD
authors.lastname: Satyarthee
authors.affiliation: Department of Neurosurgery, All India Institute of Medical Sciences, New Delhi, India.
authors.forename: P Sarat
authors.initials: PS
authors.lastname: Chandra
keywords: Arachnoid cyst; cystocisternostomy; cystoperitoneal shunt; endoscopy; interhemispheric arachnoid cyst