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Lipomatous meningioma: characteristic computed tomographic appearance
G J Fitt1, R Kalnins, L A Mitchell
1Department of Radiology, University of Melbourne, Heidelberg, Victoria, Australia.
Australasian Radiology
|February 1, 1996
Summary
Lipomatous meningioma, a rare tumor with mature fat cells, presents unique CT imaging features. Fat presence on CT scans helps differentiate it from malignant tumors, indicating a benign nature.
Area of Science:
- Neurosurgery
- Neuropathology
- Radiology
Background:
- Meningiomas are common primary tumors of the central nervous system, typically arising from the arachnoid mater.
- Lipomatous meningioma is an exceedingly rare subtype characterized by the presence of mature adipocytes within the tumor.
- Understanding the imaging characteristics of rare meningioma variants is crucial for accurate diagnosis and patient management.
Observation:
- A case of lipomatous meningioma is presented, detailing its occurrence and histological features.
- Computed tomography (CT) revealed heterogeneous attenuation and enhancement patterns within the tumor.
- These imaging findings can be mistaken for necrotic malignant neoplasms.
Findings:
- The heterogeneous appearance on CT is attributed to the presence of mature adipocytes within the meningioma.
- Demonstration of fat attenuation on CT is a key indicator suggesting a benign pathological process.
- Lipomatous meningioma should be considered in the differential diagnosis of extra-axial tumors containing fat.
Implications:
- Accurate radiological interpretation can prevent misdiagnosis of lipomatous meningioma as a malignant tumor.
- Recognition of this rare variant aids in appropriate surgical planning and patient counseling.
- Further research into the pathogenesis and imaging of lipomatous meningiomas may improve diagnostic accuracy.