title: Progressive multifocal leukoencephalopathy after fludarabine therapy for low-grade lymphoproliferative disease.
abstract: Fludarabine is becoming the initial therapy for low-grade lymphoproliferative malignancies, such as CLL and follicular lymphoma. Fludarabine is highly immunosuppressive in addition to being myelosuppressive and has been associated with neurotoxicity. Progressive multifocal leukoencephalopathy (PML) is an infection with JC virus of the white matter of the central nervous system seen mostly in immunosuppressed patients. We describe two patients treated with fludarabine who developed PML. Immunolabeling was positive for JCV in both patients, but PCR was repeatedly negative in one of them. We suggest that fludarabine may increase the risk of PML in patients with lymphoproliferative diseases.
authors: Department of Hematology and Pathology, Landspitali University Hospital, Hringbraut, 101 Reykjavik, Iceland.
authors: Brynjar
authors: B
authors: Vidarsson
authors: Deane F
authors: DF
authors: Mosher
authors: M Shahriar
authors: MS
authors: Salamat
authors: Helgi J
authors: HJ
authors: Isaksson
authors: Pall T
authors: PT
authors: Onundarson
mesh_terms: D000368:Aged; D000970:Antineoplastic Agents / Q000009:adverse effects* / Q000627:therapeutic use; D006801:Humans; D007166:Immunosuppressive Agents / Q000009:adverse effects* / Q000627:therapeutic use; D007577:JC Virus / Q000302:isolation & purification; D007968:Leukoencephalopathy, Progressive Multifocal / Q000139:chemically induced* / Q000821:virology; D008232:Lymphoproliferative Disorders / Q000188:drug therapy* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D014740:Vidarabine / Q000009:adverse effects* / Q000031:analogs & derivatives / Q000627:therapeutic use
chemical_list: D000970:Antineoplastic Agents; D007166:Immunosuppressive Agents; D014740:Vidarabine; C024352:fludarabine