An 8-month-old previously healthy boy presents to the ED with fever and nystagmus. He has been having cough, congestion, and rhinorrhea for about 1 week. Over the past 2 days, he has been persistently febrile despite antipyretics. Today in his pediatrician's office, he was diagnosed with bilateral acute otitis media (AOM). However, the physician noted horizontal nystagmus in the child and sent him to the ED for further evaluation.
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