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[Parkinsonism following lethargic encephalitis].

D W Piechocki

    Neurologia I Neurochirurgia Polska
    |September 1, 1977
    PubMed
    Summary

    A man developed Parkinsonism after a febrile illness. Treatment with amantadine (Viregyt) and Levodopa (L-Dopa) significantly improved his extrapyramidal signs and hemiparesis.

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    Area of Science:

    • Neurology
    • Neuroscience
    • Infectious Diseases

    Background:

    • Lethargic encephalitis, a rare neurological condition, can manifest with diverse post-infectious sequelae.
    • Extrapyramidal signs and movement disorders are recognized, though less common, complications of viral encephalitis.

    Observation:

    • A 41-year-old male presented with progressive extrapyramidal signs, including a hypertonic-hypokinetic syndrome and right-sided spastic hemiparesis, following a febrile illness with sleep disturbances.
    • The patient experienced excessive somnolence and developed hypaesthesia, indicating significant neurological involvement.

    Findings:

    • The patient's condition was diagnosed as Parkinsonism secondary to lethargic encephalitis.
    • A notable improvement in motor symptoms was achieved with a combination therapy of amantadine (Viregyt) and low-dose Levodopa (L-Dopa).

    Implications:

    • This case highlights the potential for Parkinsonism as a delayed complication of certain febrile encephalitic illnesses.
    • The positive response to amantadine and Levodopa suggests dopaminergic pathways are involved and amenable to treatment in post-encephalitic Parkinsonism.
    • Early recognition and targeted pharmacotherapy can lead to significant functional recovery in patients with post-encephalitic movement disorders.

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