Clinical Reasoning: A 24-Year-Old Man With Persistent Spontaneous Dizziness.

A previously healthy 24-year-old man presented with acute-onset vertigo after a recent tick bite sustained during a hiking trip. The initial illness included fever, malaise, headache, and neck stiffness, all of which resolved without treatment within 1 week. Days later, he developed persistent vertigo accompanied by nausea, vomiting, and imbalance, but without hearing loss or other focal neurologic deficits. Neurologic examination localized the lesion, and imaging confirmed the suspected site of involvement. Additional diagnostic testing identified an unusual abnormality correlating with the clinical findings. The patient was treated appropriately based on the findings, leading to complete resolution of symptoms and full recovery.