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FIG 5. T1-weighted axial MR images of a clivus meningioma obtained after administration of contrast material.
Top row, Images obtained before embolization show the tumor displacing the pons and compressing the fourth ventricle on the right side.
Middle row, 4 days after embolization of the meningioma, extensive necrotic areas are visible, especially in the rostral and dorsal parts of the tumor.
Bottom row, 5 months later, tumor is significantly reduced in size. The necrotic areas are resorbed and the compression of the pons and the fourth ventricle is barely detectable.
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