title: JC virus leukoencephalopathy complicating Wegener's granulomatosis.
abstract: Progressive multifocal leukoencephalopathy (PML) is a demyelinating disease of the brain caused by the JC virus. It occurs in association with immunodepression due, for instance, to a hematological malignancy, HIV infection, or immunosuppressive therapy for an organ transplant or systemic disease. We describe the fourth reported case of PML in a patient receiving immunosuppressants for Wegener's granulomatosis. A 71-year-old woman receiving azathioprine and glucocorticoid therapy experienced onset of right-sided hemiplegia within a few days, became comatose, and died within a few days. MRI of the brain showed a subcortical lesion in the left parietal lobe generating low signal on T1 images and high signal on T2 images. The initial diagnosis was cerebral vasculitis. However, the postmortem examination showed PML. The diagnosis of PML rests on JC virus detection in the cerebrospinal fluid by PCR assay and on demonstration in a brain biopsy of the typical histological pattern with presence of the JC virus within the demyelinated lesions. No specific or effective treatments are available. Immunosuppressant drugs should be discontinued if possible.
authors.affiliation: Travail du Service de Rhumatologie, Groupe Hospitalier Bichat-Claude-Bernard, 46, rue Henri-Huchard, 75877 Paris cedex 18, France.
authors.forename: Christian
authors.initials: C
authors.lastname: Pagnoux
authors.forename: Gilles
authors.initials: G
authors.lastname: Hayem
authors.forename: Fabienne
authors.initials: F
authors.lastname: Roux
authors.forename: Sid Ahmed
authors.initials: SA
authors.lastname: Rouidi
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Palazzo
authors.forename: Dominique
authors.initials: D
authors.lastname: Hénin
authors.forename: Olivier
authors.initials: O
authors.lastname: Meyer
mesh_terms: D000368:Aged; D001379:Azathioprine / Q000009:adverse effects*; D017809:Fatal Outcome; D005260:Female; D005938:Glucocorticoids / Q000009:adverse effects*; D014890:Granulomatosis with Polyangiitis / Q000188:drug therapy*; D006801:Humans; D016867:Immunocompromised Host / Q000276:immunology*; D007166:Immunosuppressive Agents / Q000009:adverse effects*; D007577:JC Virus; D007968:Leukoencephalopathy, Progressive Multifocal / Q000139:chemically induced* / Q000821:virology
chemical_list: D005938:Glucocorticoids; D007166:Immunosuppressive Agents; D001379:Azathioprine