Subdural osteoma [Neurosurgery Wiki]

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====== Subdural osteoma ======

Subdural [[osteoma]]s are benign [[neoplasm]]s 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
((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.
)).
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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
((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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Cheon JE, Kim JE, Yang HJ. CT and pathologic findings of a case of subdural osteoma. Korean J Radiol. 2002;3:211–213. 
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Kim JK, Lee KJ, Cho JK, et al. Intracranial intraparenchymal ostemoa. J Korean Neurosurg Soc. 1998;27:1450–1454.
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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.
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Lee ST, Lui TN. Intracerebral osteoma: case report. Br J Neurosurg. 1997;11:250–252.
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Vakaet A, De Reuck J, Thiery E, vander Eecken H. Intracerebral osteoma: a clinicopathologic and neuropsychologic case study. Childs Brain. 1983;10:281–285.
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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. 
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Akiyama M, Tanaka T, Hasegawa Y, Chiba S, Abe T. Multiple intracranial subarachnoid osteomas. Acta Neurochir (Wien) 2005;147:1085–1089. discussion 1089.
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Pau A, Chiaramonte G, Ghio G, Pisani R. Solitary intracranial subdural osteoma: case report and review of the literature. Tumori. 2003;89:96–98.
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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.
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Constantinidis J. [Intrathalamic osteoma] Psychiatr Neurol (Basel) 1967;154:366–372.