TY - JOUR T1 - Clinical Significance of Neoadjuvant Chemotherapy With Gemcitabine Plus S-1 for Resectable Pancreatic Ductal Adenocarcinoma JF - In Vivo JO - In Vivo SP - 2027 LP - 2035 DO - 10.21873/invivo.11700 VL - 33 IS - 6 AU - TAKASHI SUZUKI AU - SHOZO MORI AU - TAKAYUKI SHIMIZU AU - KAZUMA TAGO AU - NOBUHIRO HARADA AU - KYUNG-HWA PARK AU - YUHKI SAKURAOKA AU - TAKAYUKI SHIRAKI AU - YUKIHIRO ISO AU - TAKU AOKI AU - KEIICHI KUBOTA Y1 - 2019/11/01 UR - http://iv.iiarjournals.org/content/33/6/2027.abstract N2 - Background/Aim: Little is known about the efficacy of neoadjuvant chemotherapy (NAC) with gemcitabine plus S-1 (GS) for patients with resectable pancreatic ductal adenocarcinoma (R-PDAC). The aim of this study was to investigate differences in the long-term outcome of patients with R-PDAC undergoing pancreatectomy with and without NAC-GS to clarify the clinical significance of NAC-GS. Patients and Methods: A total of 77 patients with R-PDAC who were scheduled for pancreatectomy between January 2012 and December 2017 were enrolled. Of these patients, 39 received NAC-GS (GS group) and 38 had upfront surgery (UFS group). Results: Among the 77 patients, one patient in each group did not undergo pancreatectomy due to intraoperative non-curative factors. Median tumor size and the number of lymph nodes with metastasis were significantly lower in the GS group than in the UFS group (p=0.002 and p=0.017). However, the 5-year overall survival rate was similar in the two groups (26.1% versus 21.5%, p=0.930). Conclusion: NAC-GS may not be recommended for patients with R-PDAC since it does not seem to offer any survival benefits. ER -