Progressive multifocal leukoencephalopathy recrudescence in an autoimmune hepatitis flare

Area of Science:

• Neuroimmunology
• Infectious Diseases
• Neurology

Background:

• Progressive multifocal leukoencephalopathy (PML) is a rare demyelinating disease of the central nervous system.
• PML is caused by the John Cunningham (J.C.) virus, typically reactivating in immunocompromised individuals.
• Atypical presentations of PML, especially in the context of immune dysregulation, require careful consideration.

Purpose of the Study:

• To describe a unique case of PML recrudescence.
• To explore the potential role of autoimmune flares in unmasking latent J.C. virus.
• To emphasize the need for multidisciplinary management in complex PML cases.

Main Methods:

• Case report of a young woman with a history of migraines, Factor V Leiden, and intravenous drug use.
• Clinical presentation including headache, fatigue, and leg weakness.
• Neuroimaging demonstrating stable PML lesions and laboratory findings indicating an autoimmune hepatitis flare.

Main Results:

• The patient experienced a transient worsening of neurologic deficits during an autoimmune hepatitis flare.
• This exacerbation suggested a recrudescence of PML activity.
• The findings indicate a potential link between autoimmune perturbations and J.C. virus reactivation.

Conclusions:

• Autoimmune-mediated events may trigger latent J.C. virus activity, leading to atypical PML presentations.
• Multidisciplinary care is crucial for managing patients with complex and atypical PML.
• Further research is needed to understand and manage these challenging cases.