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Transtentorial epidermoid cysts.

P Lunardi1, P Missori

  • 1Department of Neurological Sciences, Neurosurgery, University of Rome La Sapienza, Italy.

Acta Neurochirurgica
|January 1, 1991
PubMed
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Epidermoid cysts can affect both above and below the tentorium. Complete removal is challenging, but long-term outcomes for these brain cysts are generally good, regardless of size or surgical approach.

Area of Science:

  • Neurosurgery
  • Neuropathology
  • Neuroradiology

Background:

  • Epidermoid cysts are congenital tumors that can occur in the cerebellopontine angle and other intracranial locations.
  • Simultaneous involvement of both infra- and supra-tentorial compartments by epidermoid cysts is uncommon.
  • These cysts can cause significant mass effect and neurological deficits due to their location and growth pattern.

Purpose of the Study:

  • To present a series of eleven patients with epidermoid cysts involving both infra- and supra-tentorial cisterns.
  • To analyze the anatomical distribution and surgical management of these complex epidermoid cysts.
  • To evaluate the long-term outcomes and recurrence rates following surgical intervention.

Main Methods:

  • Retrospective case series analysis of eleven patients with epidermoid cysts.

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  • Detailed review of neuroimaging (MRI, CT) to assess cyst location and extension.
  • Surgical records were analyzed to determine the approach, extent of resection, and complications.
  • Long-term clinical follow-up was conducted to assess outcomes and recurrence.

    • Main Results:

    • Eleven patients presented with epidermoid cysts affecting both infra- and supra-tentorial regions.
    • Cyst extension varied, involving the middle cranial fossa, parasellar cisterns, posterior cranial fossa, and tentorial notch.
    • Total tumor removal was achieved in only two patients; however, only one patient experienced recurrence.
    • Surgical approach was tailored to cyst location and surgeon's expertise.
    • Long-term results were favorable and independent of cyst size or surgical strategy.

    Conclusions:

    • Epidermoid cysts can extensively involve both supra- and infra-tentorial compartments.
    • While complete resection is often difficult, surgical management can lead to favorable long-term outcomes with low recurrence rates.
    • The choice of surgical approach and initial cyst size do not appear to significantly impact long-term results.