title: Radiologic-pathologic findings in raccoon roundworm (Baylisascaris procyonis) encephalitis.
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.
authors.affiliation: Department of Neurology and Radiology, University of California, San Francisco, USA.
authors.forename: H A
authors.initials: HA
authors.lastname: Rowley
authors.forename: R M
authors.initials: RM
authors.lastname: Uht
authors.forename: K R
authors.initials: KR
authors.lastname: Kazacos
authors.forename: J
authors.initials: J
authors.lastname: Sakanari
authors.forename: W V
authors.initials: WV
authors.lastname: Wheaton
authors.forename: A J
authors.initials: AJ
authors.lastname: Barkovich
authors.forename: A W
authors.initials: AW
authors.lastname: Bollen
mesh_terms: D000818:Animals; D001196:Ascariasis / Q000175:diagnosis* / Q000473:pathology / Q000635:transmission; D001706:Biopsy; D001921:Brain / Q000473:pathology; D020809:Central Nervous System Helminthiasis / Q000175:diagnosis* / Q000473:pathology / Q000635:transmission; D002675:Child, Preschool; D004802:Eosinophilia / Q000175:diagnosis* / Q000469:parasitology / Q000473:pathology; D005243:Feces / Q000469:parasitology; D006801:Humans; D007816:Larva Migrans, Visceral / Q000175:diagnosis / Q000473:pathology / Q000635:transmission; D008297:Male; D008590:Meningoencephalitis / Q000175:diagnosis* / Q000473:pathology / Q000635:transmission; D011821:Raccoons / Q000469:parasitology*