Bell's palsy. T1- weighted contrast-enhanced MR images demonstrate abnormal enhancement of the distal left cisternal (arrow, (a)), labyrinthine (arrow, (b)), first genu (arrowhead, (b)), and mastoid (arrow, (d)) segment of the facial nerve. Enhancement of the first genu, tympanic and mastoid segments was asymmetrically greater than the normal contralateral side (not shown).
