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Contrast-enhanced MRI of the nasal sinus revealed the following signs: soft tissue manifesting iso-T1 and long-T2 signals in bilateral nasal cavities and an apparent enhanced lesion protruding into the right orbit and having a blurred boundary with the right rectus eye muscle. The tumor invaded upward into the anterior skull base and left frontal lobe. (A: T1-weighted MRI; B: T2-weighted MRI; and C, D: Gd-enhanced T1-weighted MRI).
