Abstract
Objective: Clinical parameters such as grade, size and/or location of the tumor are good predictors of outcome in patients with astrocytoma. The objective of this study was to determine whether DNA content parameters have a prognostic significance for this group of tumors.
Methods: Following optimization and validation of methodology for evaluating cellular DNA content parameters (CDCP), tumor DNA ploidy and percent S phase fraction (SPF) were determined from 64 patients using formalin fixed, paraffin embedded specimens (mean coefficient of variation = 4.94) obtained over a 10-year period. Median survival times correlated with grade (I/II =1154 vs. III/IV= 483days, P=0.0317). Fifty-five percent of the specimens contained DNA aneuploid (DNA-A) components (average SPF=18.3%) and 45% were DNA diploid (DNA-D) (average SPF=9.6%). Survival did not correlate with overall differences in DNA ploidy (DNA-D=181 vs. DNA-A=206days, P=0.6314) when treated and untreated tumors were analyzed. However, a trend for prolonged median survival was observed in patients whose tumors were untreated with respect to cytotoxic therapy based on DNA ploidy status (DNA-D=275 vs. DNA-A=15days, P=0.3408). Survival for all patients did not correlate with median SPF (< 13.5% av.= 121 vs. > 13.5% av.= 154days, P=0.6534).
Conclusion: DNA content parameters may correlate with the natural history and treatment outcome of newly diagnosed untreated patients with astrocytomas.
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Supported by NIH CA 40498–01A1; NIH P30CA22453
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El-Rayes, B.F., Norton, C.S., Sakr, W. et al. Cellular DNA content parameters as prognostic indicators in human astrocytomas. J Neurooncol 71, 85–89 (2005). https://doi.org/10.1007/s11060-004-6044-x
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DOI: https://doi.org/10.1007/s11060-004-6044-x