Prognostic significance of cellular proliferation in renal cell carcinoma: a comparison of synthesis-phase fraction and proliferating cell nuclear antigen index.
DNA aneuploidy has repeatedly been shown to be a significant prognostic indicator in renal cell carcinoma; however, few studies have emphasized the importance of measurements of cellular proliferation. This study evaluated 55 patients treated by radical nephrectomy and for whom clinical follow-up was available. There were 36 men and 19 women with a mean age of 61 yr. Robson stage distribution was I, 38 cases; II, five cases; and III, 12 cases. Flow cytometric analysis in 44 cases revealed 29 DNA diploid and 15 DNA aneuploid tumors with a median synthesis-phase fraction (SPF) of 4.4% (range 1.0 to 31.4%). The median proliferating cell nuclear antigen index was 3.9% (range 0.1 to 58.0%). There was a significant correlation between SPF and proliferating cell nuclear antigen index (R = 0.769) in the 33 cases in which both were available. Cellular proliferation, as determined by SPF, was a significant prognostic indicator (P < 0.02), but proliferating cell nuclear antigen index did not correlate with outcome (P > 0.05). Other significant predictors in this study were Robson stage (P = 0.03) and nuclear grade (P = 0.0003). DNA ploidy did not correlate with outcome (P > 0.05). We conclude that cellular proliferation, as measured by SPF analysis, is a significant predictor of outcome for renal cell carcinoma. Although the proliferating cell nuclear antigen index correlated with SPF, it did not achieve statistical significance as a prognostic indicator.
Grignon
D J
DJ
Department of Pathology, Victoria Hospital, London, Canada.
Abdel-Malak
M
M
Mertens
W
W
Koster
J
J
Keeney
M
M
Sakr
W
W
Shepherd
R R
RR
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002292:Carcinoma, Renal Cell / Q000473:pathology*; D002455:Cell Division; D004273:DNA, Neoplasm / Q000096:biosynthesis* / Q000235:genetics; D005260:Female; D006801:Humans; D007680:Kidney Neoplasms / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D011003:Ploidies; D011379:Prognosis; D018809:Proliferating Cell Nuclear Antigen / Q000032:analysis*; D012189:Retrospective Studies
D004273:DNA, Neoplasm; D018809:Proliferating Cell Nuclear Antigen