Unilateral Gunshot Wound of the Pons: Clinical, Electrophysiologic, and Neuroradiologic Correlates

• Following a gunshot wound to the face, a 17-year-old male patient experienced a right trigeminal and abducens paralysis, dysarthria, right-sided ataxia, left-sided weakness of the lower part of the face and limbs, and left-sided sensory loss from his neck down. Brainstem auditory evoked potentials showed a decreased P₅/P₁ amplitude ratio for left ear presentation, and inconsistent replication of P₂ and P₃ on the right and, to a lesser extent, on left ear click presentations. A computerized tomography scan showed right pontine atrophy. These findings point to a unilateral lesion of the right pons.