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Migrating pseudomeningocele causing posterior fossa syndrome

Lars de Jong1, Koen Engelborghs, Jan Vandevenne

  • 1Department of Neurosurgery, University Hospitals Leuven, Leuven, Belgium. lars.dejong@uzleuven.be

British Journal of Neurosurgery
|May 8, 2012
PubMed

Insights

Spontaneous intracerebellar migration of a pseudomeningocele, a rare complication after posterior fossa surgery, can cause severe cerebellar dysfunction. Surgical intervention, including dural repair, effectively resolves symptoms.

Area of Science:

  • Neurosurgery
  • Neurology
  • Cerebrospinal Fluid Dynamics

Background:

  • Posterior fossa surgery can lead to complications such as pseudomeningocele formation.
  • Intracerebellar migration of pseudomeningoceles is a rare but serious event.
  • Cerebellar mass effect from pseudomeningocele migration poses a life-threatening risk.

Observation:

  • Two cases of spontaneous intracerebellar pseudomeningocele migration are presented.
  • Patients exhibited progressive or acute cerebellar dysfunction.
  • A one-way valve mechanism of cerebrospinal fluid (CSF) movement is hypothesized.

Findings:

  • Spontaneous intracerebellar migration of pseudomeningocele is a rare complication of posterior fossa surgery.
  • This migration can cause significant cerebellar mass effect and neurological deficits.
  • The probable mechanism involves progressive CSF accumulation within the pseudomeningocele, leading to herniation into the cerebellum.

Implications:

  • Prompt diagnosis and surgical management are crucial for favorable outcomes.
  • Surgical options include evacuation, dural repair, CSF shunting, or marsupialization.
  • Effective treatment leads to resolution of symptoms and prevention of further neurological damage.

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