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Oligodendroglioma. Histologic evaluation and prognosis.

S J Mørk, T B Halvorsen, K F Lindegaard

    Journal of Neuropathology and Experimental Neurology
    |January 1, 1986
    PubMed
    Summary

    Histologic features of oligodendroglioma, including microcysts, necrosis, and cell density, significantly impact patient survival. Other features like vascular proliferation and calcification showed no prognostic value in this study.

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    Area of Science:

    • Neuropathology
    • Oncology
    • Epidemiology

    Background:

    • Oligodendrogliomas are primary brain tumors with variable histology.
    • Understanding the prognostic significance of specific histologic features is crucial for patient management.

    Purpose of the Study:

    • To determine the frequency of histologic features in oligodendrogliomas.
    • To correlate these features with patient survival data.

    Main Methods:

    • Retrospective analysis of 208 oligodendroglioma cases diagnosed in Norway (1953-1977).
    • Independent re-examination of tumor specimens by two pathologists.
    • Minimum five-year observation period for survival analysis.

    Main Results:

    • Characteristic oligodendrogliomas showed medium cell density, moderate nuclear atypia, vascular proliferation, and calcification.

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  • Microcysts, necrosis, and cell density were the only significant prognostic histologic features.
  • Subpial infiltrative growth was suggestive of prognostic value, while mitotic figures were not associated with survival.

    • Conclusions:

    • Histologic features like microcysts, necrosis, and cell density are key prognostic indicators for oligodendroglioma.
    • Vascular endothelial proliferation, calcification, and mitotic rate do not significantly correlate with survival.
    • Age, sex, and symptom duration did not alter the prognostic significance of these histologic findings.