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[Visual and auditory evoked potentials in latent syphilis].

R A Vignale, D Cibils, M Medici

    Medicina Cutanea Ibero-Latino-Americana
    |January 1, 1985
    PubMed
    Summary

    Latent syphilis can cause subclinical neurological damage, particularly affecting the auditory pathway. Auditory evoked potentials are crucial for detecting these brainstem lesions, even with normal cerebrospinal fluid.

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    Area of Science:

    • Neurology
    • Infectious Diseases
    • Neurophysiology

    Context:

    • Latent syphilis, a stage of syphilis infection, often presents without overt symptoms.
    • Subclinical neurological involvement is suspected in asymptomatic patients.
    • Previous mucocutaneous lesions were absent in the study cohort.

    Purpose:

    • To investigate neurological involvement in latent syphilis using evoked potentials.
    • To assess the utility of visual and auditory evoked potentials in detecting subclinical neurological deficits.
    • To evaluate the impact of benzathine penicillin treatment on neurological status.

    Summary:

    • Evoked potentials (visual and auditory) were studied in 43 patients with latent syphilis.
    • No abnormalities were found in visual evoked potentials, but auditory evoked potentials were abnormal in 20 cases.

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  • These abnormalities suggest subclinical neurological lesions in the brainstem, despite normal cerebrospinal fluid and positive immune complexes.

    • Impact:

    • Auditory evoked potentials are highly sensitive in detecting neurological alterations in latent syphilis.
    • Findings indicate significant subclinical neurological involvement in nearly 50% of patients in this syphilis stage.
    • The study questions the efficacy of benzathine penicillin in treating neurological complications during this phase of syphilis.