Progressive multifocal leukoencephalopathy risk factors

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Risk Factors

Anyone with a weakened immune system, however, are at greater risk of developing PML. Causes of a weakened immune system include:

AIDS (less common now because of better AIDS treatments).
Certain medications used to treat multiple sclerosis, rheumatoid arthritis, and related conditions.
Leukemia and lymphoma.