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Evolution of central necrosis in a meningioma: CT and MR features
1Department of Radiology, Los Angeles County University of Southern California Medical Center 90033.
Abstract:
A 44-year-old patient underwent CT and magnetic resonance (MR) imaging and was found to have a typical appearing meningioma. The meningioma was of increased density relative to brain and enhanced homogeneously on CT. It was slightly hypointense on T1-weighted MR images and isointense on T2-weighted MR images relative to cortex. Thirty days later, repeat CT and MR scans showed change of the tumor consistent with central necrosis. An area of central low density developed on the CT scans, and a central high signal developed on the T2-weighted MR images. Pathological sectioning confirmed central necrosis of a syncytial meningioma.
Insights
A meningioma, a brain tumor, showed central necrosis on follow-up imaging. This case highlights imaging changes in meningioma over time.
Area of Science:
- Neuropathology
- Neuroradiology
- Neurosurgery
Background:
- Meningiomas are typically benign tumors arising from the meninges.
- Initial imaging characteristics of meningiomas can vary.
- Monitoring tumor changes is crucial for patient management.
Observation:
- A 44-year-old patient presented with a typical meningioma on initial CT and MR imaging.
- The tumor demonstrated increased density and homogeneous enhancement on CT, with specific signal intensities on MR.
- Repeat imaging after 30 days revealed significant changes within the tumor.
Findings:
- The follow-up CT scan showed a central low-density area, indicative of necrosis.
- T2-weighted MR images displayed a central high signal, also consistent with necrosis.
- Pathological examination confirmed central necrosis within the syncytial meningioma.
Implications:
- This case illustrates the potential for central necrosis to develop in meningiomas.
- Understanding these imaging changes is vital for accurate diagnosis and treatment planning.
- Further research may explore the mechanisms and clinical significance of meningioma necrosis.