Porencephalic cyst after endoscopic third ventriculostomy and Ommaya reservoir placement: case report and review of the literature

Childs Nerv Syst. 2021 Sep;37(9):2917-2921. doi: 10.1007/s00381-021-05042-w. Epub 2021 Jan 13.

Abstract

Background: A 13-year-old female patient was diagnosed with a tectal glioma (TG), a subgroup of astrocytoma that can result in obstructive hydrocephalus secondary to aqueductal stenosis. Endoscopic third ventriculostomy (ETV) is used to treat this type of hydrocephalus with a good success rate. Our institution performs ETV and Ommaya reservoir (OR) placement in these cases. The OR allows measurement of intracranial pressure (ICP) and cerebrospinal fluid (CSF) access and a method for performing ventricular dye studies to evaluate third ventricular stoma (TVS) patency. In this case, a porencephalic cyst (PC) developed around the OR's ventricular catheter (OVC) two and a half months after surgery.

Conclusion: The PC is thought to have developed in association with TVS stoma closure and resolved after ETV revision.

Keywords: Aqueductal stenosis; Endoscopic third ventriculostomy; Hydrocephalus; Ommaya reservoir; Porencephalic cyst; Tectal glioma.

Publication types

  • Case Reports
  • Review

MeSH terms

  • Adolescent
  • Cerebrospinal Fluid Shunts
  • Cysts* / etiology
  • Cysts* / surgery
  • Female
  • Humans
  • Hydrocephalus* / etiology
  • Hydrocephalus* / surgery
  • Neuroendoscopy*
  • Third Ventricle* / diagnostic imaging
  • Third Ventricle* / surgery
  • Treatment Outcome
  • Ventriculostomy