FIG 5. Axial images obtained in elderly HIV-negative woman with HZV ophthalmicus preceding retrobulbar optic neuritis and mental status changes.

A and B, Nonenhanced and enhanced T2-weighted FLAIR images at the level of the pons show minimal abnormal high signal intensity in A and avid enhancement in B in the left ambient cistern, supracerebellar cistern, cerebellar vermis and adjacent subarachnoid space along the tentorium (arrowheads).

C–E, Axial images at the level of the midbrain. Contrast-enhanced conventional T1-weighted image in C shows minimal enhancement. Nonenhanced (D) and enhanced (E) T2-weighted FLAIR images show avid enhancement of the optic nerves, chiasm, tracts, and pericavernous region (black arrowheads), right lateral geniculate body (white arrowhead), interpeduncular cistern (black arrow), and supracerebellar cistern (white arrow).