Presentation
Left abducens nerve palsy.
Patient Data
Age: 45 years
Gender: Female
From the case:
Epidermoid cyst with abducent 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.
Case Discussion
MRI features characteristic of a prepontine cistern epidermoid cyst, compressing the left abducens nerve (6th cranial nerve).
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