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Glioependymal cysts: CT and MR findings
A Ismail1, D Tampieri, D Melanson
1Department of Radiology, Montreal Neurological Hospital, Quebec, Canada.
Journal of Computer Assisted Tomography
|November 1, 1992
Summary
This study evaluated intracranial glioependymal cysts in four patients. Imaging revealed characteristic patterns, suggesting these cysts can be diagnosed using specific MRI signal intensities.
Area of Science:
- Neurology
- Neurosurgery
- Radiology
Background:
- Intracranial glioependymal cysts are rare lesions.
- Surgical intervention is often considered for symptomatic cysts.
Observation:
- Four patients with intracranial glioependymal cysts were assessed over seven years.
- All patients underwent surgical drainage and cyst wall biopsy.
- Cranial CT showed hypodense lesions without contrast enhancement.
Findings:
- MRI revealed well-defined cysts isointense to cerebrospinal fluid (CSF) on T1-weighted images.
- Lesions were iso- or mildly hyperintense to CSF on proton density and T2-weighted images.
- One case demonstrated a fluid-fluid level, indicating high protein content.
Implications:
- Diagnosis of glioependymal cysts can be suggested by characteristic MRI signal intensities.
- CSF-like signal patterns on T1 and T2-weighted MRI are key diagnostic indicators.
- These findings aid in differentiating glioependymal cysts from other intracranial lesions.