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General
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Pathophysiology
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Radiology
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Radiology images
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MRI of benign meningioma with bony invasion

Atypical meningioma with surrounding edema

Treatment
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Gross description
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Micro description
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Micro images
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Tumor invading sinonasal mucosa

Nests and tongues of tumor invading brain

Brain invasion highlighted by GFAP

Brain invasion highlighted by GFAP



Note the clear arachnoid plane between brain and tumor - NOT invasion

SPARC

Diffuse infiltrative invasion at the tumor/brain interface

Tumor invasion into the adjacent dura

Nodular invasion at the tumor/brain interface

Positive stains
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Negative stains
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Differential diagnosis
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End of CNS tumor > Meningeal tumors > Invasive meningioma



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