J Korean Neurosurg Soc.  2014 Jul;56(1):58-60. 10.3340/jkns.2014.56.1.58.

Non-Dural-Based Spinal Meningioma : The First Case Report of a Fibrous Subtype and a Review of the Literature

• Lee JH
• Moon HJ
• Kim JH
• Park YK

• KMID: 2067079
• DOI: http://doi.org/10.3340/jkns.2014.56.1.58

Abstract

Spinal meningiomas typically adhere to the dura matter. Non-dural based spinal meningiomas are rare and most are clear cell meningiomas. We report here the first case of a fibrous meningioma with non-dural attachment. The patient was a 49-year-old female, who complained of numbness in the legs and a gait disturbance. Magnetic resonance imaging revealed a 1.7x1.4-cm mass in the C7-T1 intra-dural extramedullary space, showing peripheral gadolinium enhancement without a "dural tail sign". A complete microsurgical resection was performed. The mass was covered with a white membrane but was not adhered to the dura, and its appearance was consistent with a neurilemmoma. The histopathological diagnosis was fibrous-type meningioma. The recovery of the patient was uneventful. No surgical complications and no recurrence of the tumor had occurred at the 6-month follow-up.

Keyword

Spinal tumor; Fibrous meningioma; Non-dural based

MeSH Terms

Diagnosis
Female
Follow-Up Studies
Gadolinium
Gait
Humans
Hypesthesia
Leg
Magnetic Resonance Imaging
Membranes
Meningioma*
Middle Aged
Neurilemmoma
Recurrence
Gadolinium

Figure

• 

  Fig. 1 Preoperative magnetic resonance image of the cervical spine. A 1.7×1.4-cm lobulated mass in the C7-T1 dorsal space. A low-signal-intensity elliptical lesion on a T2-weighted image (A). Peripherally enhanced lesion on a gadolinium-enhanced T1-weighted image (B).

• 

  Fig. 2 Operative microscopic view. The tumor is covered with a white membrane, and there is no attachment to the dura mater.

• 

  Fig. 3 Pathologic findings of the tumor. Spindle-shaped cells in a collagen-rich matrix, showing moderate nuclear polymorphism, and forming parallel fascicles. H&E stain, ×100 (A), ×200 (B).

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  Fig. 4 Magnetic resonance image 1 week postoperatively. T2-weighted (A) and gadolinium-enhanced T1-weighted image (B). No residual tumor is detected.

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