title: Symptomatic prepontine cistern flattening after an arachnoid cyst shunting: a report of 2 cases.
abstract: BACKGROUND
  Controversy still exists about the best management modality for congenital arachnoid cyst. Shunting procedures have been one of the treatment options offered to patients with this condition. Although arachnoid cysts shunting have been associated with a variety of clinical conditions, its relationship with flattened prepontine cistern has not been described.
  
  
  METHODS
  We describe two children with congenital arachnoid cyst managed with cystoperitoneal shunt, both of whom were later discovered to have developed flattened prepontine cistern and imaging findings of overcrowding of the posterior cranial fossa.
  
  
  CONCLUSIONS
  These cases demonstrate that flattening of the prepontine cisterns and acquired posterior cranial fossa overcrowding may be a potential fall out in patients with cystoperitoneal shunt due to an arachnoid cyst.
authors: Division of Neurosurgery, UCLA School of Medicine, Los Angeles, California 90095-7039, USA.
authors: Ferdnand
authors: F
authors: Osuagwu
authors: Natasha
authors: N
authors: Fagel
authors: Noriko
authors: N
authors: Salamon
authors: Jorge
authors: J
authors: Lazareff
mesh_terms: D016080:Arachnoid Cysts / Q000473:pathology / Q000503:physiopathology / Q000601:surgery*; D002557:Cerebrospinal Fluid Shunts / Q000009:adverse effects*; D003388:Cranial Fossa, Posterior / Q000473:pathology / Q000503:physiopathology / Q000601:surgery*; D004677:Encephalocele / Q000209:etiology / Q000473:pathology / Q000503:physiopathology; D005260:Female; D006801:Humans; D006849:Hydrocephalus / Q000209:etiology / Q000473:pathology / Q000601:surgery*; D007223:Infant; D008279:Magnetic Resonance Imaging; D008297:Male; D019635:Neurosurgical Procedures / Q000009:adverse effects; D011149:Pons / Q000473:pathology / Q000601:surgery*; D011183:Postoperative Complications / Q000209:etiology / Q000473:pathology / Q000503:physiopathology; D013346:Subarachnoid Space / Q000473:pathology / Q000601:surgery*; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome