Ginkgo leaf sign: a highly predictive imaging feature of spinal meningioma. Yamaguchi S, Takeda M, Takahashi T, Yamahata H, Mitsuhara T, Niiro T, Hanakita J, Hida K, Arita K, Kurisu K. (2018) Clinical neurology and neurosurgery. Arachnoid isolation sign: A predictive imaging feature of spinal meningioma on CT-myelogram. Spinal meningioma: relationship between histological subtypes and surgical outcome?. Spinal meningiomas: review of 174 operated cases. Solero CL, Fornari M, Giombini S, Lasio G, Oliveri G, Cimino C, Pluchino F. Spinal meningiomas in patients younger than 50 years of age: a 21-year experience. Cohen-Gadol AA, Zikel OM, Koch CA, Scheithauer BW, Krauss WE. Meningothelioma as the predominant histological subtype of midline skull base and spinal meningioma. Lee JH, Sade B, Choi E, Golubic M, Prayson R. (2019) Radiographics : a review publication of the Radiological Society of North America, Inc. Intradural Extramedullary Spinal Neoplasms: Radiologic-Pathologic Correlation. AJNR Am J Neuroradiol (full text) - Pubmed citation MR imaging features of clear-cell meningioma with diffuse leptomeningeal seeding. Occasionally, densely calcified meningiomas are hypointense on T1 and T2 and show only minimal contrast enhancement. T1 C+ (Gd): moderate homogeneous enhancement.T2: isointense to slightly hyperintense.T1: isointense to slightly hypointense, possibly heterogeneous.They share similar signal characteristics to typical intracranial meningiomas: ginkgo leaf sign in meningiomas arising lateral or ventrolateral to the spinal cord 14.arachnoid isolation sign: intradural tumor separated from spinal cord by contrast in subarachnoid space 13.calcification may be present but are uncommon (5%) 8.hyperostosis may be seen but is not as common as in the intracranial forms.Multiple meningiomas are most often associated with NF2 6. Most meningiomas are solitary lesions (98%). Those in the cervical spine are more likely to be located anteriorly compared to those in the thoracic spine 6. Meningiomas are most often located lateral to the spinal cord (60-70%) 11,12. Spinal meningiomas are not distributed evenly along the canal 2: The remainder (5%) have both intradural and extradural components taking on a dumbbell appearance 2. Occasionally (5%), purely extradural tumors are found. The vast majority (90%) of spinal meningiomas are intradural extramedullary in location. WHO grade II clear cell meningiomas have a predilection for the spine and are believed to originate from the denticulate ligaments 6,7.įor a discussion of the pathology of meningiomas, refer to the general meningioma article. The most common spinal meningioma histology is WHO grade I meningothelial meningioma (80%) 9. There are many histomorphometric variants of meningioma recognized in the WHO classification. Less common are tumors with more aggressive features consistent with WHO grade II (5-25%) or grade III (1-5%). Most spinal meningiomas are benign, with 70-90% being classified as WHO grade I lesions 8. Less common presentations include sensory deficits, pain and sphincter dysfunction. The majority of patients present with motor deficits as a result of compression of the spinal cord. Despite usually being small, due to the confines of the spinal canal, spinal meningiomas can result in significant neurologic dysfunction.
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