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A 13-year-old boy developed visual loss in association with an upper respiratory tract infection. Neuro-ophthalmologic examination indicated a lesion at the junction of the right optic nerve and chiasm. Laboratory investigation and subsequent serologic studies demonstrated recent Epstein-Barr virus infection, suggesting an association of chiasmal optic(More)
An 18-year-old man had noticed increasing difficulty in walking for 4 years. Examination disclosed spastic paraparesis and posterior column signs suggestive of subacute combined degeneration of the spinal cord. Urinalysis, urinary thin-layer chromatography, and intestinal biopsy disclosed typical cystinuria. Pernicious anemia and other known enteropathies(More)
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