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Volume 18, Number 10—October 2012
Dispatch

Powassan Virus Encephalitis, Minnesota, USA

Justin BirgeComments to Author  and Steven Sonnesyn
Author affiliations: Abbott Northwestern Hospital, Minneapolis, Minnesota, USA

Main Article

Figure 1

A) Noncontrast, sagittal T1-weighted magnetic resonance image of the brain of a 67-year-old woman with suspected Powassan virus encephalitis, obtained 4 days after admission. Image is notable for nonspecific signal changes within the thalami, midbrain, cerebellar vermis, and both cerebellar hemispheres. B) Noncontrast, sagittal T1-weighted magnetic resonance image of the brain obtained 8 days after patient’s admission. Changes include marked interval progression of signal abnormality involving t

Figure 1. . . A) Noncontrast, sagittal T1-weighted magnetic resonance image of the brain of a 67-year-old woman with suspected Powassan virus encephalitis, obtained 4 days after admission. Image is notable for nonspecific signal changes within the thalami, midbrain, cerebellar vermis, and both cerebellar hemispheres. B) Noncontrast, sagittal T1-weighted magnetic resonance image of the brain obtained 8 days after patient’s admission. Changes include marked interval progression of signal abnormality involving the cerebellum, thalamus, and midbrain. Mass effect within the posterior fossa and crowding of structures at the foramen magnum are also evident. Marked dilatation of the lateral and third ventricles with acute hydrocephalus is apparent.

Main Article

Page created: September 14, 2012
Page updated: September 14, 2012
Page reviewed: September 14, 2012
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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