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The Journal of Thoracic and Cardiovascular Surgery, Vol 106, 210-217, Copyright © 1993 by The American Association for Thoracic Surgery and The Western Thoracic Surgical Association

ARTICLES

Prognostic significance of flow cytometry in non-small-cell lung cancer

TW Rice, TW Bauer, GN Gephardt, SV Medendorp, DA McLain and TJ Kirby
Department of Thoracic and Cardiovascular Surgery, Cleveland Clinic Foundation, OH 44195.

To clarify the value of deoxyribonucleic acid (DNA) ploidy analysis, we prospectively studied single-parameter flow cytometric findings of fresh tissue from 272 patients with primary non-small-cell lung cancer from whom adequate tissue from the lung cancer was available. The mean age of the patients was 65.5 years; 65.8% were men. Histologic types were as follows: adenocarcinoma, 107 (39.3%); squamous cell, 100 (36.8%); large cell, 56 (20.6%); adenosquamous, 8 (2.9%); and giant cell, 1 (0.4%). Histologic grades were as follows: I (well differentiated), 15 (5.5%); II, 100 (36.8%); and III, 157 (57.7%). American Joint Committee on Cancer stages were as follows: I, 151 (55.5%); II, 38 (14%); III, 74 (27.2%); and IV, 9 (3.3%). Survivals at 1 year and 3 years were 74.2% +/- 2.8% and 52.4% +/- 4.8%, respectively. For non-squamous cell lung cancer, multivariate analyses with the Cox proportional hazards regression model for survival showed (1) that increasing American Joint Committee on Cancer stage (p < 0.001), male gender (p = 0.02), and histologic grades II and III (p = 0.04) were of independent (negative) prognostic significance and (2) that the presence and absence of DNA aneuploidy (p = 0.91), the classification of DNA histogram (p = 0.81), the DNA index (p = 0.46), and the results of cell cycle analysis in tumors with no aneuploidy (S phase, p = 0.23; S + G2M, p = 0.62) were of no prognostic significance. For squamous cell lung cancer, multivariate analyses showed that increasing American Joint Committee on Cancer stage (p = 0.003) and increasing DNA index (p = 0.009) were of independent (negative) prognostic significance.

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