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Endoscopic Approach for Colloid Cyst Resection
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Case Report: Floating fat globule within an arachnoid cyst.

Jayanand Sudhir1, Chittur Viswanathan Gopalakrishnan, Sathia Prabhu

  • 1Department of Neurosurgery, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, India.

The Indian Journal of Radiology & Imaging
|October 21, 2011
PubMed
Summary

This study reports the first case of a solitary floating fat globule within an intracranial arachnoid cyst, a rare finding not previously documented in such lesions. The research explores the potential cause of fat within this specific type of brain cyst.

Keywords:
Arachnoid cystintralesional fatmagnetic resonance imaging

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Area of Science:

  • Neurology
  • Radiology
  • Pathology

Background:

  • Intralesional fat globules are documented in ovarian teratomas and head/neck dermoids.
  • Fat globules in the subarachnoid space suggest ruptured intracranial dermoids.
  • Floating fat globules have not been previously reported within intracranial lesions.

Purpose of the Study:

  • To report a unique case of an intralesional solitary floating fat globule within a multicompartmental arachnoid cyst.
  • To describe the varying locations of the fat globule on serial imaging.
  • To propose a hypothesis for the pathogenesis of fat within an arachnoid cyst.

Main Methods:

  • Case report of a patient with an intracranial arachnoid cyst.
  • Serial neuroimaging analysis to track the fat globule.
  • Literature review on fat globules in cystic lesions.

Main Results:

  • A solitary floating fat globule was identified within an intracranial arachnoid cyst.
  • The fat globule demonstrated variable locations on serial imaging.
  • A novel hypothesis for the pathogenesis of fat within an arachnoid cyst was proposed.

Conclusions:

  • This is the first reported instance of an intralesional solitary floating fat globule within an intracranial arachnoid cyst.
  • The findings expand the understanding of fat deposition in intracranial cystic lesions.
  • The proposed hypothesis offers a new perspective on the origin of fat in arachnoid cysts.