Figure 2. Magnetic resonance imaging scans showing brain abnormalities in a previously healthy adult with Baylisascaris meningoencephalitis, California, USA. A–D) Postgadolinium contrast T1 images obtained 4 weeks after symptom onset. A–C) Axial images, moving inferiorly to superiorly, demonstrating nodular bilateral enhancement within the cerebellar hemispheres, thalami, and subcortical white matter. D) Sagittal image further demonstrates multifocal areas of enhancement in cerebral hemispheres. Additional, mild T2 abnormalities (not shown) were present at the same time. E–H) T2/FLAIR (fluid attenuation inversion recovery) images obtained 6 weeks after symptom onset. E–G) Axial images, moving inferiorly to superiorly, demonstrating patchy and confluent hyperintense lesions throughout the supratentorial white matter and cerebellum. H) Sagittal image further demonstrates the high degree of white matter abnormality, which was not present on the earlier imaging. Postcontrast enhancement on T1 imaging (not shown) had nearly resolved at this time.