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Published on: August 15, 2025
A primary intraosseous cystic meningioma: Case report
Riccardo Caruso1, Giuseppina Fini2, Alessandro Pesce3
1Army Hospital of Rome "Celio", Neurosurgery Department, Via S. Stefano Rotondo n. 4, 00184, Roma, Italy; Sapienza University of Rome, Department of Neurology and Psychiatry, Viale dell 'Università n.30, 00185, Roma, Italy.
Introduction:
This is a very rare case of intraosseous cystic meningioma. There have been no reports of similar cases in the last 30 years.
Presentation Of Case:
A 62-year-old man, suffering from a swelling of the lateral wall of the left orbit was admitted to our hospital. MRI and CT scan showed a large intradiploic lesion involving the lateral wall of the orbit and the greater wing of the sphenoid. The lesion was cystic with a mural nodule. We operated the patient and removed completely the mural nodule and the fibrous wall of cyst. Histological examination showed that the mural nodule was a benign meningothelial meningioma.
Discussion:
Primary intraosseous meningiomas represent a subtype of primary extradural meningiomas; they comprise about 2% of all meningiomas and are therefore rare entities. Cystic meningiomas are rare, their incidence compared to all other types of meningiomas is of 2-4%. The presence of a meningioma with both characteristics: cystic and intraosseous, like in our case, is an exceptional occurrence.
Conclusion:
The surgical management of tumor was easy; its rarity means that the case is interesting.
