Metastatic meningiomas: an unusual clinical and pathological diagnosis with highly variable outcome
Fabien Forest1, Sid-Ali Berremila, Cezar Gyenes
1Service d'anatomie et cytologie pathologiques, Centre Hospitalier Universitaire de Saint-Etienne, Hôpital Nord., 42055, Saint Etienne Cedex2, France, fabienforest@gmail.com.
Abstract:
Metastatic meningioma is a rare situation. We conducted a retrospective study from our databases and identified cases of metastatic meningioma. We report three presentations of patients with medical history of surgical removal of meningioma presenting several years later a liver tumor with bone metastasis or multiple lung tumors. These observations highlight the difficulty of the clinical and pathological diagnosis and the absence of consideration of metastatic state for histologically "benign" but clinically aggressive meningiomas in the current WHO 2007 classification of meningiomas. We also reviewed published cases of metastatic meningiomas since they are clearly distinguished from haemangiopericytoma.
Insights
Metastatic meningioma, though rare, presents diagnostic challenges. This study highlights aggressive meningiomas that metastasize, emphasizing the need for updated classifications beyond benign histology.
Area of Science:
- Neuro-oncology
- Pathology
- Oncology
Background:
- Metastatic meningioma is an uncommon event, often posing diagnostic difficulties.
- The current WHO 2007 classification may not fully capture the metastatic potential of certain meningiomas.
Observation:
- This retrospective study identified cases of metastatic meningioma.
- Three patients with a history of meningioma surgery developed liver tumors with bone metastasis or lung metastases years later.
Findings:
- Clinical and pathological diagnosis of metastatic meningioma can be challenging.
- Histologically benign meningiomas can exhibit aggressive behavior and metastasize.
- Metastatic meningiomas are distinct from haemangiopericytomas.
Implications:
- The findings suggest a need to reconsider the classification of meningiomas, particularly those with aggressive clinical behavior.
- Awareness of metastatic potential is crucial for accurate diagnosis and patient management.
- Further research is warranted to identify predictive markers for meningioma metastasis.
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