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Intraosseous microcystic meningioma
1Department of Pathology and Oncology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan.
Skeletal Radiology
|August 10, 2000
Summary
This study details a rare intraosseous microcystic meningioma in an elderly woman's skull. This finding expands the differential diagnosis for myxoid bone tumors of the calvarium.
Area of Science:
- Neurosurgery
- Oncology
- Pathology
Background:
- Extradural ectopic meningiomas are exceptionally rare tumors.
- Meningiomas typically arise from meningothelial cells outside the central nervous system.
Observation:
- A case of a microcystic meningioma presenting as an osteolytic lesion in the left parietal bone of an elderly woman is described.
- Radiological and surgical findings confirmed an intraosseous tumor without extraosseous extension.
Findings:
- Histopathological, immunohistochemical, and ultrastructural analyses confirmed the diagnosis of a microcystic meningioma variant.
- This represents the first reported instance of an intraosseous microcystic meningioma.
Implications:
- The findings suggest that intraosseous microcystic meningioma should be considered in the differential diagnosis of calvarial myxoid bone tumors.
- This case highlights the diverse presentations of meningiomas and the importance of comprehensive diagnostic evaluation.