Progressive multifocal leukoencephalopathy in a patient with systemic mastocytosis treated with cladribine

•PML has recently been associated with several immune therapies utilized in multiple sclerosis (MS), a disorder with autoreactive T-cells.•Cladribine is an effective drug against MS, but may cause prolonged depression of the CD4 counts.•This is the second published PML case associated with the use o...

Ausführliche Beschreibung