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New and Old Concepts and Strategies for Progressive Multifocal Leukoencephalopathy | OMICS International | Abstract
ISSN: 2376-0389

Journal of Multiple Sclerosis
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Review Article

New and Old Concepts and Strategies for Progressive Multifocal Leukoencephalopathy

Isabel Moreira and Monica Marta*

Department of Neuroscience & Trauma Centre, Queen Mary University of London, City and Country: London, United Kingdom

Corresponding Author:
Monica Marta
Department of Neuroscience & Trauma Centre
Queen Mary University of London
City and Country: London, United Kingdom
Tel: +44 78872667
E-mail: [email protected]

Received date: August 13, 2014; Accepted date: October 28, 2014; Published date: November 05, 2014

Citation: Moreira I, Marta M (2014) New and Old Concepts and Strategies for Progressive Multifocal Leukoencephalopathy . J Mult Scler 1:126. doi:10.4172/2376-0389-1000126

Copyright: © 2014 Moreira I, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


There has been recent progress in the area of John-Cunningham virus (JCV) infection and progressive multifocal leukoencephalopathy (PML). New drugs and better reporting identify new risk cohorts and importantly development of new risk assessment strategies. The clinical presentation has not changed, but presentation of rarer forms of JCV infection are now apparent. Brain magnetic resonance imaging (MRI) continues to be a pillar of PML diagnosis. The imaging correlation with pathology and the new understanding of the biology and improved methods to detect JCV significantly help with recent diagnostic criteria. Unfortunately a small number of trials for specific treatment of PML have not proven beneficial, and the possibility remains to improve the JCV- specific immune response. Sometimes this response creates an exacerbation of neurological features – immune reconstitution inflammatory syndrome – that helps resolve the infection but can cause damage in itself. Overall, the prognosis of PML has improved with much lower mortality but still severe neurological deficits.

This review aims to bring together old and new knowledge of PML and help reconsider practical clinical strategies.