UpToDate: Subdural osteoma

Subdural osteoma

Subdural osteomas are benign neoplasms that are rarely encountered.

Case reports

Yang et al., report the case of a 64‑year‑old female patient with a left temporal subdural osteoma.

The patient presented with intermittent dizziness that first began two years earlier. Non-contrast computed tomography revealed a densely calcified left temporal extra-axial mass. Magnetic resonance imaging of the lesion revealed signal loss on T1-weighted and T2-weighted images and non-enhancement on Gadolinium enhanced T1-weighted images, and Diffusion weighted magnetic resonance imaging and ADC images demonstrated reduced values attributed to calcium-induced signal loss. Histologically, the lesion predominantly consisted of lamellar bone without bone marrow elements. The patient underwent stereotactic magnetic resonance imaging-guided neurosurgical resection and recovered without complication.

Subdural osteomas may not be enhanced on magnetic resonance imaging. Surgical tumourectomy can be considered for symptomatic patients with subdural osteomas 1).

A 29-year-old female presented with a 3-year history of headaches. Computed tomography scan revealed a homogeneous high-density lesion isolated from the inner table of the frontal bone (a lucent dural line) in the right frontal convexity. Magnetic resonance imaging revealed an extra-axial lesion with a broad base without dural tail sign and punctate enhancement pattern characteristic of abundant adipose tissue. Upon surgical excision, we found a hard bony mass clearly demarcated from the dura. The mass displayed characteristics of an osteoma upon histological examination. The symptom was relieved after operation 2).

Cheon JE, Kim JE, Yang HJ. CT and pathologic findings of a case of subdural osteoma. Korean J Radiol. 2002;3:211–213.

Kim JK, Lee KJ, Cho JK, et al. Intracranial intraparenchymal ostemoa. J Korean Neurosurg Soc. 1998;27:1450–1454.

Jung TY, Jung S, Jin SG, Jin YH, Kim IY, Kang SS. Solitary intracranial subdural osteoma: intraoperative findings and primary anastomosis of an involved cortical vein. J Clin Neurosci. 2007;14:468–470.

Lee ST, Lui TN. Intracerebral osteoma: case report. Br J Neurosurg. 1997;11:250–252.

Vakaet A, De Reuck J, Thiery E, vander Eecken H. Intracerebral osteoma: a clinicopathologic and neuropsychologic case study. Childs Brain. 1983;10:281–285.

Haddad FS, Haddad GF, Zaatari G. Cranial osteomas: their classification and management. Report on a giant osteoma and review of the literature. Surg Neurol. 1997;48:143–147.

Akiyama M, Tanaka T, Hasegawa Y, Chiba S, Abe T. Multiple intracranial subarachnoid osteomas. Acta Neurochir (Wien) 2005;147:1085–1089. discussion 1089.

Pau A, Chiaramonte G, Ghio G, Pisani R. Solitary intracranial subdural osteoma: case report and review of the literature. Tumori. 2003;89:96–98.

Aoki H, Nakase H, Sakaki T. Subdural osteoma. Acta Neurochir (Wien) 1998;140:727–728. [PubMed] 10. Choudhury AR, Haleem A, Tjan GT. Solitary intradural intracranial osteoma. Br J Neurosurg. 1995;9:557–559.

Constantinidis J. [Intrathalamic osteoma] Psychiatr Neurol (Basel) 1967;154:366–372.


Yang H, Niu L, Zhang Y, Jia J, Li Q, Dai J, Duan L, Pan Y. Solitary subdural osteoma: A case report and literature review. Clin Neurol Neurosurg. 2018 Jul 2;172:87-89. doi: 10.1016/j.clineuro.2018.07.004. [Epub ahead of print] PubMed PMID: 29986201.

Kim EY, Shim YS, Hyun DK, Park H, Oh SY, Yoon SH. Clinical, Radiologic, and Pathologic Findings of Subdural Osteoma: A Case Report. Brain Tumor Res Treat. 2016 Apr;4(1):40-3. doi: 10.14791/btrt.2016.4.1.40. Epub 2016 Apr 29. PubMed PMID: 27195262; PubMed Central PMCID: PMC4868817.

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