Abstract
Pretreatment serum tumor marker levels predict outcome in non-small cell lung cancer (NSCLC). However, little is known about the clinical value of such measurements for patients treated with pemetrexed plus a platinum-derivative. We retrospectively screened 100 chemotherapy-naïve patients with advanced non-squamous NSCLC treated with pemetrexed plus a platinum-derivative in relation to the pretreatment level of cytokeratin 19 fragment (CYFRA 21-1) and carcinoembryonic antigen (CEA). Sixty one patients with a high CYFRA 21-1 level had statistically shorter progression-free and overall survival than 39 patients with a normal CYFRA 21-1 level (median progression-free survival=127 days vs. 191 days, respectively; p=0.046; median overall survival=360 days vs. 781 days, respectively, p<0.001). Serum CEA level was not related to survival. Serum CYFRA 21-1 level is a predictive and prognostic marker in patients with NSCLC treated with pemetrexed plus a platinum-derivative.
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