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Unusual growth pattern of a meningioma
Hiroshi Kashimura1, Tomohiko Mase, Kuniaki Ogasawara
1Department of Neurosurgery, Iwate Prefectural Chubu Hospital, Kitakami, Iwate, Japan.
Background:
Rhabdoid meningioma exhibits high mitotic activity, anaplasia, and increased markers of cell proliferation. Here we describe a rhabdoid meningioma with a pattern of growth extending into the subarachnoid space and filled the cortical sulci.
Case Description:
A 72-year-old woman presented with headache and was admitted to our hospital. Neurologic and physical examinations revealed no abnormalities. Contrast-enhanced axial T1-weighted images showed a well-enhanced, dural-based mass compressing the right temporal and frontal lobes, and extending into the sylvian cistern and filling the cortical sulci. The patient underwent partial resection and the histologic findings demonstrated rhabdoid meningioma.
Conclusion:
Although this type of tumor is known to be aggressive in its growth, extension into the adjacent cisternal space and the filling of the cortical sulci are rare. The combination of histologic anaplasia with the highest reported proliferation rate, loss of cohesion of neoplastic cells, and the location of the tumor led to the unique growth pattern.
Insights
This case study details an aggressive rhabdoid meningioma with unusual growth into the subarachnoid space. The tumor
Area of Science:
- Neuro-oncology
- Pathology
Background:
- Rhabdoid meningioma is characterized by high mitotic activity and anaplasia.
- These tumors often exhibit aggressive growth patterns.
Observation:
- A 72-year-old woman presented with headache and was found to have a dural-based mass.
- Imaging revealed a tumor extending into the sylvian cistern and filling cortical sulci.
Findings:
- Histological examination confirmed the diagnosis of rhabdoid meningioma.
- The tumor displayed a rare growth pattern involving extensive subarachnoid space infiltration.
Implications:
- This unique presentation highlights the aggressive potential of rhabdoid meningiomas.
- Understanding such growth patterns is crucial for surgical planning and patient management.
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