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Related Experiment Videos

Enhancing mass on CT: neoplasm or recent infarction?

J C Masdeu

    Neurology
    |July 1, 1983
    PubMed
    Summary

    Distinguishing brain tumors from recent infarcts on CT scans is challenging. However, white matter edema, cortical ribbon enhancement, and thalamic sparing show promise in differentiating these supratentorial lesions.

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    Area of Science:

    • Neuroradiology
    • Neuroimaging
    • Oncology

    Background:

    • Computed tomography (CT) is crucial for evaluating supratentorial lesions.
    • Differentiating brain neoplasms from recent infarcts using CT findings like mass effect and contrast enhancement is often difficult.
    • Recent infarcts frequently exhibit mass effect and contrast enhancement, mimicking neoplasms.

    Purpose of the Study:

    • To identify specific CT findings that help differentiate supratentorial brain neoplasms from recent infarcts.
    • To assess the diagnostic value of white matter edema, cortical ribbon enhancement, and thalamic sparing in distinguishing between tumors and infarcts.

    Main Methods:

    • Retrospective review of CT scans from 100 patients with histologically confirmed supratentorial lesions.
    • Analysis included 35 infarcts and 65 tumors (metastases and gliomas).
    • Evaluation of three specific CT imaging features: white matter edema, cortical ribbon enhancement, and thalamic sparing.

    Main Results:

    • White matter edema outlining the uninvolved cortex was observed in 73% of metastases and 74% of gliomas, versus only 14% of infarcts.
    • Cortical ribbon enhancement was present in 43% of infarcts, compared to 7% of gliomas and 4% of metastases.
    • Selective sparing of the thalamus was noted in 31% of infarcts but in only 7% of tumors.

    Conclusions:

    • White matter edema and thalamic sparing are more indicative of brain neoplasms than infarcts.
    • Cortical ribbon enhancement is a more frequent finding in recent infarcts.
    • These specific CT findings can improve the accuracy in differentiating supratentorial brain tumors from infarcts.

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