title: Suprasellar arachnoid cyst after subdural haemorrhage in an infant. A case based update.
abstract: BACKGROUND
  Brain arachnoid cysts (AC) are congenital or acquired malformations. Their prevalence in children ranges between 0.2 and 2.3% of the studied populations. Few reported studies exist where AC appears after a subdural haemorrhage.
  
  
  METHODS
  We present one case of a symptomatic suprasellar AC after post-traumatic subdural haemorrhage in an infant.
  
  
  RESULTS
  After endoscopic ventriculocystostomy, the child quickly improved and the cyst reduced in size. The child was monitored for 22 months and his neurocognitive development remained normal.
  
  
  CONCLUSIONS
  Our case led us to the hypothesis that the inflammatory process due to subdural haemorrhage may locally result in arachnoiditis, and thus to the creation of a neomembrane, and eventually to cyst formation. This is also the case with the development of post-traumatic spinal AC.
authors.affiliation: Service de neurochirurgie pédiatrique, université de Lorraine, hôpital d'Enfants, CHU de Nancy, 4, rue du Morvan, 54500 Vandœuvre-lès-Nancy, France.
authors.forename: M-H
authors.initials: MH
authors.lastname: Sonnet
authors.affiliation: Service de neurochirurgie pédiatrique, université de Lorraine, hôpital d'Enfants, CHU de Nancy, 4, rue du Morvan, 54500 Vandœuvre-lès-Nancy, France.
authors.forename: A
authors.initials: A
authors.lastname: Joud
authors.affiliation: Service de neurochirurgie pédiatrique, université de Lorraine, hôpital d'Enfants, CHU de Nancy, 4, rue du Morvan, 54500 Vandœuvre-lès-Nancy, France.
authors.forename: J-C
authors.initials: JC
authors.lastname: Marchal
authors.affiliation: Service de neurochirurgie pédiatrique, université de Lorraine, hôpital d'Enfants, CHU de Nancy, 4, rue du Morvan, 54500 Vandœuvre-lès-Nancy, France. Electronic address: o.klein@chu-nancy.fr.
authors.forename: O
authors.initials: O
authors.lastname: Klein
mesh_terms: D016080:Arachnoid Cysts / Q000150:complications / Q000601:surgery*; D020863:Central Nervous System Cysts / Q000150:complications / Q000601:surgery*; D006408:Hematoma, Subdural / Q000209:etiology / Q000601:surgery*; D006801:Humans; D007223:Infant; D008297:Male; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome
keywords: Arachnoid cyst; Head trauma; Hématome sous-dural; Kyste arachnoïdien; Neurochirurgie pédiatrique; Paediatric neurosurgery; Subdural haemorrhage; Suprasellaire; Suprasellar; Traumatisme crânien