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Free Content Solitary Fibrous Tumor/Hemangiopericytoma: A Companion Case Discussion of a Spectrum of Rare CNS Mesenchymal Tumors and Their Evolving WHO Classification

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The combined term solitary fibrous tumor/hemangiopericytoma was recently introduced in the World Health Organization Classification of Tumors of the Central Nervous System 2016 revision. The consolidation came amid mounting evidence that these 2 mesenchymal tumors are closely related, or even identical, entities. These neoplasms demonstrate significant clinical and demographic overlap, often indistinguishable imaging features, and a shared nerve growth factor inducible-A-binding protein 2/signal transducer and activator of transcription 6 gene fusion. We presented 2 cases of this uncommon entity and discussed its evolving tumor classification.
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Keywords: ECA = external carotid artery; HPC = hemangiopericytoma; MMA = middle meningeal artery; NAB2 = nerve growth factor inducible-A-binding protein 2; SFT = solitary fibrous tumor; STA = superficial temporal artery; STAT6 = signal transducer and activator of transcription 6; WHO = World Health Organization

Document Type: Research Article

Publication date: June 1, 2018

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  • Neurographics is the peer-reviewed, bimonthly educational journal of the American Society of Neuroradiology. The journal comprises articles selected from material presented at the ASNR Annual Meeting. Neurographics also publishes other high-quality submissions that are primarily educational and have a high emphasis on a pictorial approach. Neurographics offers CME credit for reading review articles and completing quiz-based self-assessment activities. CME credit for review articles may be claimed up to 3 years after an article's publication date. Visit to view all available CME courses.
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