Abstract
We investigated which is the stronger predictor, pathological response or metabolic response, for survival outcome in patients treated with neoadjuvant chemoradiotherapy (NACRT) plus esophagectomy for thoracic esophageal squamous cell carcinoma (TESCC). Fifty consecutive patients with cStage IIB-IV TESCC were enrolled. We analyzed the pathological response and metabolic response (fractional decrease in tumor maximum standardized uptake value) to NACRT. Independent prognostic factors predictive of 3-year survival were investigated using univariate and multivariate analyses. Among the 50 patients, 10 (20%) showed a pathological complete response (in both tumor and lymph nodes) and 36 (72%) showed grade 2-3 pathological response. Univariate analysis showed that age, gender, cT stage, pathological response and metabolic response to be significant prognostic factors. A subsequent multivariate analysis confirmed metabolic response and gender to be significant prognostic factors. Metabolic response for NACRT was an independent prognostic factor and a more powerful predictor of survival compared to pathological response.
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