A primary intraosseous cystic meningioma: Case report

• Published in: International journal of surgery case reports 2017-01, Vol.37, p.189-192
• Main Authors: Caruso, Riccardo, Fini, Giuseppina, Pesce, Alessandro, Wierzbicki, Venceslao, Marrocco, Luigi, Piccione, Emanuele, Pasquini, Paola
• Format: Article
• Language: English
• Subjects: Case Report; Cystic; Intradiploic; Intraosseous; Meningioma; Osteolysis
• ISSN: 2210-2612; 2210-2612
• DOI: 10.1016/j.ijscr.2017.06.049

•Intraosseous cystic meningioma is a very rare.•There are no reports of similar cases in the last 30 years.•Primary intraosseous meningioma is a subtype of primary extradural meningioma.•Cystic meningioma is rare, 2–4% of all meningiomas.•A meningioma with both characteristics is an exceptional occurrence. This is a very rare case of intraosseous cystic meningioma. There have been no reports of similar cases in the last 30 years. 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. 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. The surgical management of tumor was easy; its rarity means that the case is interesting.