Primary Intraosseous Osteolytic Meningioma of the Skull Mimicking Scalp Mass: A Case Report and Review of Literature

Abstract

Primary extradural meningioma is about 1-2% of all meningiomas. Primary intraosseous meningioma is a rare form of intra-bone tumors that account for approximately 67% of extradural meningiomas. We report a primary intraosseous meningioma of a 69-year-old man who had headaches and a mass on right parietal scalp for the past few months. Remarkably, the brain tissue within the osteolytic cavity of the skull was normal in computed tomography and magnetic resonance images. Resection, duraplasty, and cranioplasty were performed. The patient's symptoms disappeared after surgery, and the histological diagnosis was an osseous meningothelial meningioma (World Health Organization grade I).

Role of Ultrasound in a Rare Case of Primary Lymphoma of the Cranial Vault

“…The differential diagnosis includes other skull tumors such as metastatic carcinoma [7], osteomyelitis [8], granuloma [9], plasmacytoma [10], meningioma [11], anaplastic meningioma [12], meningeal sarcoma [13], sarcomatoid carcinoma [14], etc.…”

Intraosseous Meningioma Presenting as Occipital Bone Mass

“…Meningiomas are usually benign tumors and originate from the meninges. Intradiploic meningiomas constitute about 2% of all meningiomas and are classified as extradural meningiomas . Few cases have been reported in the literature .…”

“…The significant increase in choline and the significant decrease in creatinine and NAA levels are important findings on MR spectroscopy. 1,3,4 In addition, the increase…”

“…1 Few cases have been reported in the literature. 1 Intradiploic meningiomas can be confused with primary calvarial bone tumors. As intraosseous meningioma is rarely seen, intraosseous meningiomas are misdiagnosed because of insufficient preoperative evaluations.…”

“…The significant increase in choline and the significant decrease in creatinine and NAA levels are important findings on MR spectroscopy. 1,3,4 In addition, the increase in alanine level is important for the diagnosis of meningiomas because of the typical MR spectroscopic findings for the meningiomas. 3,4 Intraosseous meningiomas may be confused with bone-derived tumors.…”