Abstract
A 13-month-old boy developed eosinophilic meningoencephalitis, retinitis, and a protracted encephalopathy with severe residual deficits. The initial MR examination revealed diffuse periventricular white matter disease, and follow-up images showed atrophy. Brain biopsy, serology, and epidemiologic studies lead to the diagnosis of Baylisascaris procyonis infection, a parasitic disease contracted through exposure to soil contaminated by the eggs of a common raccoon intestinal roundworm. The pathologic, epidemiologic, and imaging features of this disease are herein reviewed.
MeSH terms
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Animals
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Ascariasis / diagnosis*
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Ascariasis / pathology
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Ascariasis / transmission
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Biopsy
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Brain / pathology
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Central Nervous System Helminthiasis / diagnosis*
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Central Nervous System Helminthiasis / pathology
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Central Nervous System Helminthiasis / transmission
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Child, Preschool
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Eosinophilia / diagnosis*
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Eosinophilia / parasitology
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Eosinophilia / pathology
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Feces / parasitology
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Humans
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Larva Migrans, Visceral / diagnosis
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Larva Migrans, Visceral / pathology
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Larva Migrans, Visceral / transmission
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Male
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Meningoencephalitis / diagnosis*
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Meningoencephalitis / pathology
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Meningoencephalitis / transmission
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Raccoons / parasitology*