Epidermoid cyst with abducent nerve palsy
Left abducens nerve palsy.
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The MRI sequences demonstrate a well-defined oblong lesion (20 X 9 X 7 mm) at the left anterolateral aspect of the prepontine cistern, anterior to the facial and vestibulocochlear nerves at the level of the cisternal portion of the left abducent, and trigeminal nerves. It shows a low signal intensity on T1, a high signal on T2, a heterogeneous high signal on FLAIR, and an intermediate signal on Fiesta with restricted diffusion. No enhancement seen on postcontrast sequences.