MRI
Axial T1 C+ fat sat
Coronal T1
Coronal T1 C+ fat sat
Coronal T2
Sagittal T1
Axial T1
MRI through the base of skull demonstrates a well circumscribed mass at the left petrous apex. It shows striking high T1 signal and demonstrates no convincing enhancement or fat suppression on fat suppressed post contrast images.
T2 signal is heterogeneous with a thin rim of signal drop out peripherally.