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At the right petrous apex a soft tissue mass with intermediate T1 signal, very high T2 signal and prominent contrast enhancement, is noted. It extends to the anterior margin of the internal acoustic meatus posteriorly and to the carotid canal anteriorly. Normal flow void in the artery is preserved. No internal calcification.
In this location, a lesion with very high T2 signal most likely represents a chondrosarcoma. Chordomas are usually more medial (midline). Other lesions would not be expected to be this enhancing and high T2 in signal (with the exception of a hemangioma, which would not be expected to have so much bony destruction).