Johns Hopkins HIV Guide →Diagnosis →Opportunistic Infections →Viral

Progressive multifocal leukoencephalopathy (PML)

Lisa A. Spacek, M.D., Ph.D.
Progressive multifocal leukoencephalopathy (PML) is a topic covered in the Johns Hopkins HIV Guide.

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PATHOGENS

  • JC (after patient "JC" John Cunningham) virus is a ubiquitous neurotropic ds-DNA polyomavirus. Infects oligodendrocytes and astrocytes.
  • Primarily affects deep and subcortical white matter of brain and can expand into cortical gray matter. Rarely involves spinal cord. Spares optic nerve.[2]
  • Virus resides in extraneural reservoirs, i.e., lymphoid tissue, kidney, and bone marrow. Excreted in urine of healthy individuals and those with PML.[5]
  • Seroprevalence of 70-80%, antibody not protective, those with deficient cellular response, e.g. HIV/AIDS, organ transplantation, hematologic malignancies, and those receiving immunosuppressive therapies, are at risk for PML.[2]

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Last updated: October 31, 2015

Citation

TY - ELEC T1 - Progressive multifocal leukoencephalopathy (PML) ID - 545172 A1 - Spacek,Lisa,M.D., Ph.D. Y1 - 2015/10/31/ PB - Johns Hopkins HIV Guide UR - https://www.unboundmedicine.com/medline/view/Johns_Hopkins_HIV_Guide/545172/all/Progressive_multifocal_leukoencephalopathy__PML_ ER -