• Seven months following severe crushing closed-head trauma with initial excellent recovery, neurologic deficits referable to the right mesencephalon abruptly developed in a 28-year-old man. Computed tomography demonstrated a cystic midbrain lesion with apparent communication with the aqueduct (later confirmed at autopsy). Brain-stem auditory evoked potentials after the clinical deterioration showed depression of amplitude of wave V, compared with predeficit records, only when the ear contralateral to the brain-stem lesion was stimulated.
Anderson DC, Bundlie S, Larson DA, Rockswold G, Mastri A. Delayed Traumatic Midbrain Syrinx: Clinical, Pathologic, and Electrophysiologic Features. Arch Neurol. 1988;45(2):221–225. doi:10.1001/archneur.1988.00520260113030
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