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MRI
Contrast-enhanced MRI demonstrates an expansive extra-axial tumor formation with implantation throughout the clivus, obliterating the pre-pontine cistern and promoting brainstem compression, which is displaced posteriorly. Such lesion is well enhanced, has defined limits and lobulated contours, measuring about 4.1 x 2.6 x 2.0 cm. The tumor is close related to the V4 branches of the vertebral arteries.