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Computed tomography of herpes simplex encephalitis

D R Enzmann, B Ranson, D Norman

    Radiology
    |November 1, 1978
    PubMed
    Summary
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    Computed tomographic (CT) scans reveal characteristic unilateral lesions in the medial temporal lobe for herpes simplex encephalitis (HSE) patients. These findings aid in early diagnosis and localization of the most affected temporal lobe.

    Area of Science:

    • Neurology
    • Radiology
    • Infectious Diseases

    Background:

    • Herpes simplex encephalitis (HSE) is a severe neurological condition.
    • Early and accurate diagnosis is crucial for effective treatment and improved patient outcomes.
    • Computed tomography (CT) is a primary imaging modality used in diagnosing neurological disorders.

    Purpose of the Study:

    • To evaluate the characteristic findings on initial CT scans in patients diagnosed with HSE.
    • To determine the diagnostic utility of CT in identifying the temporal lobe involvement in HSE.
    • To assess the progression of CT findings in relation to disease course.

    Main Methods:

    • Retrospective analysis of initial CT scans from 13 patients with confirmed HSE.
    • Detailed examination of lesion location, density, and associated findings such as hemorrhage and contrast enhancement.

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  • Correlation of CT findings with clinical presentation and disease progression.

    • Main Results:

    • A unilateral, low-density lesion in the medial temporal lobe and/or insular cortex was the most characteristic initial finding in 10 out of 13 patients.
    • This characteristic lesion was observed in all patients as the disease progressed.
    • Hemorrhage and streaked contrast enhancement, observed in 3 patients, increased CT specificity but were not consistently present.

    Conclusions:

    • Initial CT scans are valuable in identifying characteristic unilateral temporal lobe lesions in HSE.
    • Focal CT findings effectively localize the temporal lobe with the greatest involvement early in the course of HSE.
    • CT imaging plays a significant role in the early diagnosis and management of herpes simplex encephalitis.