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Published on: July 4, 2007

Progressive multifocal leukoencephalopathy following rituximab treatment in a patient with rheumatoid arthritis

R M Fleischmann1

  • 1Metroplex Clinical Research Center and University of Texas Southwestern Medical Center, Dallas, TX 75231, USA. rfleischmann@arthdocs.com

Arthritis and Rheumatism
|October 31, 2009
PubMed

Insights

Progressive multifocal leukoencephalopathy (PML), a rare brain disease, was observed in a rheumatoid arthritis patient after rituximab treatment. This case underscores the importance of considering PML in patients with new neurological symptoms post-treatment.

Area of Science:

  • Neuroimmunology
  • Rheumatology
  • Oncology

Background:

  • Progressive multifocal leukoencephalopathy (PML) is a rare, fatal demyelinating disease of the central nervous system.
  • JC virus (JCV) reactivation is the causative agent of PML.
  • Rituximab, a monoclonal antibody, is used to treat autoimmune diseases like rheumatoid arthritis (RA) and Sjögren's syndrome.

Observation:

  • A case of PML is described in a patient with chronic rheumatoid arthritis and Sjögren's syndrome.
  • The patient received multiple courses of rituximab over approximately 40 months.
  • PML diagnosis occurred 18 months after the last rituximab course, with subsequent mortality.

Findings:

  • The patient developed oropharyngeal cancer and received chemoradiotherapy 9 months prior to PML diagnosis, complicating etiological determination.
  • No direct evidence linked rituximab to PML development in this specific case.
  • Neurological symptoms arose approximately 18 months post-rituximab therapy.

Implications:

  • This case highlights the potential need to consider PML in rheumatoid arthritis patients treated with rituximab who develop new neurological symptoms.
  • Further research is warranted to elucidate the precise relationship between rituximab, underlying autoimmune conditions, and PML risk.
  • Early recognition and diagnosis of PML are critical for patient management, despite treatment complexities.

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