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J Neurol Sci. 1999 Aug 15;167(2):132-6.

Long term MRI follow-up of patients with post infectious encephalomyelitis: evidence for a monophasic disease.

Author information

1
NMR Research Unit, The Institute of Neurology and National Hospital for Neurology and Neurosurgery, Queen Square, London, UK.

Abstract

Post infectious encephalomyelitis and multiple sclerosis are both inflammatory demyelinating disorders of the central nervous system. Whereas multiple sclerosis is a multi phasic disease with recurrent episodes disseminated in time and place, post infectious encephalomyelitis is usually considered to be a monophasic illness. This study used serial brain MRI to clarify whether the latter hypothesis holds for the long term. Post infectious encephalomyelitis was defined as the development of a central nervous system white matter disorder occurring in close temporal relationship with a viral, bacterial or other infection. There were eleven patients, mean age at presentation 21 years (4-48), and mean period of follow-up of 8 years (3.5-11). T2-weighted brain MRI was abnormal in all 11 cases during the acute stages of the illness. On follow-up 6 patients had made a complete clinical recovery, 4 patients had mild residual deficits and one severe neurological deficits necessitating ventilatory support. No patient experienced an exacerbation during the follow-up period. MRI revealed complete resolution of abnormalities in 3 and partial resolution in 7; new white matter lesions were seen in only one patient. This long term follow-up study suggests that there is a definable group with post infectious encephalomyelitis who exhibit a monophasic clinical and MRI pattern in the long term.

PMID:
10521553
DOI:
10.1016/s0022-510x(99)00160-4
[Indexed for MEDLINE]

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