FIG 1. Coronal gadolinium-enhanced T1-weighted images (TR/TE, 600/14) through the cerebral peduncle and cisternal course of cranial nerve III (A) demonstrate marked enhancement and subtle enlargement of cranial nerve III on the left side (white arrows in A). Notice the normal appearance of cranial nerve III on the right (arrowheads in A). There is also subtle enhancement at the cranial nerve III exit zone on the left side (black arrows in A and B), which is better appreciated on the axial gadolinium-enhanced T1-weighted image (B) performed with the same imaging parameters.