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Visual evoked potentials in sarcoidosis

L J Streletz, R A Chambers, S H Bae

    Neurology
    |December 1, 1981
    PubMed
    Summary
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    Visual evoked potential (VEP) testing revealed abnormalities in 30% of sarcoidosis patients. These findings suggest subclinical brain lesions in sarcoidosis patients without overt neurological or ocular symptoms.

    Area of Science:

    • Neuroscience
    • Ophthalmology
    • Immunology

    Background:

    • Sarcoidosis is a multisystem inflammatory disease that can affect the central nervous system and eyes.
    • The visual evoked potential (VEP) is a non-invasive neurophysiological test used to assess the integrity of the visual pathway.

    Observation:

    • This study investigated VEP abnormalities in 50 patients diagnosed with sarcoidosis.
    • VEP recordings were performed using pattern reversal stimuli.

    Findings:

    • Fifteen patients (30%) exhibited abnormal VEP latency and amplitude.
    • Abnormalities were present in all patients with clinically evident neurological disease and a significant proportion with ocular sarcoidosis.
    • Notably, 7 out of 29 patients (24%) with no clinical signs of ocular or neurological involvement showed VEP abnormalities.

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    Implications:

    • The results indicate that VEP testing can detect subclinical visual pathway dysfunction in sarcoidosis patients.
    • These subclinical abnormalities may represent early or undiagnosed sarcoid lesions affecting the brainstem or optic pathways.
    • VEP may serve as a valuable tool for early diagnosis and monitoring of neurosarcoidosis and ocular sarcoidosis.