Total neoadjuvant chemo (ctx; TNT) for locally advanced gastric cancer (GC): The Memorial Sloan Kettering Cancer Center experience.

person Megan Greally Memorial Sloan Kettering Cancer Center, New York, NY info_outline Megan Greally, Vivian E. Strong, Sam S. Yoon, Daniel G. Coit, Joanne F Chou, Marinela Capanu, David Paul Kelsen, Yelena Yuriy Janjigian, David H. Ilson, Geoffrey Yuyat Ku

Authors person Megan Greally Memorial Sloan Kettering Cancer Center, New York, NY info_outline Megan Greally, Vivian E. Strong, Sam S. Yoon, Daniel G. Coit, Joanne F Chou, Marinela Capanu, David Paul Kelsen, Yelena Yuriy Janjigian, David H. Ilson, Geoffrey Yuyat Ku Organizations Memorial Sloan Kettering Cancer Center, New York, NY, Memorial Sloan Kettering Cancer Center, New York City, NY Abstract Disclosures Research Funding U.S. National Institutes of Health Background: Peri-op chemo (ctx) and surgery is a standard in the treatment of GC, based on the MAGIC (NEJM 2006; 355:11) and FLOT4 (J Clin Oncol 35:4004 [abstr]) studies. However, less than half of patients (pts) completed ctx in the MAGIC and FLOT4 studies, mainly from issues delivering post-op therapy. We assessed safety and feasibility of TNT, where all ctx is given pre-op. Methods: We reviewed GC pts who received TNT or peri-op ctx and had surgery; decision for TNT was by physician preference, based on clinical or radiographic benefit to justify completing ctx pre-op. Pt characteristics were compared using Fisher’s exact and Wilcoxon Rank Sum tests. Post-op length of stay (LOS) was calculated from date of surgery (DOS) to date of discharge and surgical morbidity was determined using the Clavien-Dindo classification. Progression free survival (PFS) and overall survival (OS) were calculated from DOS using Kaplan-Meier methods and compared between groups using the log-rank test. Results: 120 pts were identified, median age 63, 62.5% male, 98% ECOG 0/1. 93 pts (77.5%) received peri-op ctx and 27 (22.5%) received TNT. In peri-op pts, 19%, 43% and 38% received FLOT, platinum/fluropyrimidine (FP) and ECF/EOX respectively. In TNT pts, 56%, 37% and 7% received FLOT, platinum/FP and ECF/EOX respectively. 57% had subtotal gastrectomy. Surgical outcomes were similar between groups; median LOS was 6 and 7 days (p = 0.31) in peri-op and TNT pts respectively. There was no significant difference in Clavien Dindo grade I-II or III-IV morbidity between groups (p = 0.103). There were no deaths. TNT pts received higher proportions of planned treatment than peri-op ctx pts: 90% vs. 60% FP (0.001); 85% vs. 41% platinum ( < 0.001); 100% vs. 9% epirubicin (0.015) and 53% vs. 28% docetaxel (p = 0.169). At median follow-up of 19 months, median PFS and OS were not reached. There was no significant difference in PFS (p = 0.089) or OS (p = 0.59) between groups. Conclusions: TNT appears safe with no increase in post-op LOS or surgical morbidity observed. TNT pts had higher percentage drug delivery, suggesting potential benefit for administering all ctx before surgery. While longer survival follow-up is required, TNT may be considered in pts with locally advanced GC who are candidates for ctx.