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Prognostic factors in oligodendroglioma
D Schiffer1, A Dutto, P Cavalla
1Department of Neuroscience, University of Turin, Italy.
Summary
Prognostic factors for oligodendroglioma include clinical and therapeutic elements, with MIB-1 labeling index (LI) being a key indicator. Histological factors offer limited prognostic value, and oligoastrocytomas share similar outcomes.
Area of Science:
- Neuro-oncology
- Cancer research
- Pathology
Background:
- Oligodendroglioma diagnosis lacks a definitive tumor marker, leading to histological uncertainties.
- Prognostic factors in oligodendroglioma, particularly histopathological ones, lack consistent agreement.
- This study aimed to identify reliable prognostic factors for oligodendroglioma.
Purpose of the Study:
- To identify significant prognostic factors in oligodendroglioma.
- To evaluate the prognostic significance of clinical, therapeutic, histological, and immunohistochemical parameters.
- To determine the prognostic role of MIB-1 labeling index (LI) in oligodendroglioma.
Main Methods:
- Analyzed 98 oligodendrogliomas, including 20 oligoastrocytomas.
- Correlated clinical, therapeutic, histological, and immunohistochemical data with patient survival.
- Utilized uni- and multivariate analyses to assess prognostic significance.
Main Results:
- Age, extent of resection, year of surgery, Karnofsky score, and MIB-1 LI were significant prognostic factors in multivariate analysis.
- Location, symptoms, mitoses, mitotic index (MI), apoptotic index (AI), and PCNA LI showed univariate significance.
- Oligoastrocytomas demonstrated similar survival and prognostic factors compared to pure oligodendrogliomas.
Conclusions:
- Clinical and therapeutic factors, along with MIB-1 LI (cutoff 8%), are significant prognostic indicators.
- Histological features contribute minimally to predicting oligodendroglioma prognosis.
- Oligoastrocytomas and oligodendrogliomas share comparable outcomes and prognostic profiles.