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Intraosseous meningioma of the posterior fossa--Case report
T Yamazaki1, A Tsukada, K Uemura
1Department of Neurosurgery, Kennann Hospital, Tsuchiura, Ibaraki.
Abstract:
A 62-year-old male presented with a rare intraosseous meningioma with intradural extension manifesting as frequent vomiting and floating sensation that had persisted for 3 months. Neuroimaging detected a mass lesion that was mainly located extradurally in the right posterior fossa with a daughter lesion inside the dura. He underwent surgical excision of the mass lesion. Craniectomy exposed the main lesion of the tumor just beneath the thinned outer table of the skull, and in the extradural space, with the daughter lesion penetrating the dura. Both portions of the tumor were resected. There was no attachment to the adjacent dura mater. Histological examination showed meningotheliomatous meningioma containing scattered bony tissue. This intraosseous meningioma probably originated from the occipital bone with a small intradural extension caused by mechanical compression.
Insights
A rare intraosseous meningioma, a skull bone tumor, was surgically removed from a 62-year-old male. This tumor extended into the dura, causing persistent neurological symptoms.
Area of Science:
- Neurosurgery
- Oncology
- Pathology
Background:
- Intraosseous meningiomas are rare tumors arising from the skull bone, distinct from typical meningiomas originating in the dura mater.
- This case highlights a meningioma with both extradural (within the bone) and intradural (within the spinal canal) components.
Observation:
- A 62-year-old male presented with a 3-month history of vomiting and a floating sensation.
- Neuroimaging revealed a mass in the right posterior fossa, primarily extradural with an intradural extension.
Findings:
- Surgical excision successfully removed the intraosseous meningioma and its intradural extension.
- Histological examination confirmed a meningotheliomatous meningioma with interspersed bone tissue, suggesting an occipital bone origin.
Implications:
- This case underscores the importance of considering intraosseous meningiomas in the differential diagnosis of posterior fossa masses.
- Complete surgical resection is crucial for managing these rare tumors and alleviating neurological deficits.