639PVolume reduction rate of the primary tumor of esophageal squamous cell carcinoma after neoadjuvant chemotherapy: Could this measurement be a surrogate end point for survival before surgery?. (23rd October 2018) - Nagasawa, S; Ogata, T; Hara, K; Shimoda, Y; Nakazono, M; Kumazu, Y; Hayashi, T; Yamada, T; Rino, Y; Masuda, M; Yoshikawa, T; Oshima, T