A 77-yo man had painful necrotic scalp lesions x 9 weeks, lethargy and pain while chewing x 2 weeks, and deteriorating left vision x 3 days. What is the diagnosis?
Lyme disease
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Giant cell arteritis
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Onchocerciasis (river blindness)
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Herpetic keratoconjunctivitis
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Herpes zoster ophthalmicus
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