Viral Infections

  • Author: Jin S. Suh, MD, FACP (More Info)
  • Editors in Chief: Daniel R. Kuritzkes, MD; Joseph J. Eron, Jr., MD
  • Last Reviewed: 7/26/16 (What's New)


  • Clinical manifestations of PML vary depending on the area of the central nervous system involved, ranging from diffuse encephalopathy to focal deficits such as ataxia, hemiparesis, or speech difficulties
  • Rapid progression (weeks to months) is common

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