scholarly journals Long-term outcomes of omentum-preserving versus resecting gastrectomy for locally advanced gastric cancer with propensity score analysis

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Yusuke Sakimura ◽  
Noriyuki Inaki ◽  
Toshikatsu Tsuji ◽  
Shinichi Kadoya ◽  
Hiroyuki Bando
Keyword(s):  
Gastric Cancer ◽  
Propensity Score ◽  
Advanced Gastric Cancer ◽  
Missing Values ◽  
Propensity Score Analysis ◽  
Locally Advanced ◽  
R0 Resection ◽  
Significant Difference ◽  
First Recurrence ◽  
The Impact

Abstract Omentectomy is conducted for advanced gastric cancer (AGC) patients as radical surgery without an adequate discussion of the effect. This study was conducted to reveal the impact of omentum-preserving gastrectomy on postoperative outcomes. AGC patients with cT3 and 4 disease who underwent total or distal gastrectomy with R0 resection were identified retrospectively. They were divided into the omentum-preserved group (OPG) and the omentum-resected group (ORG) and matched with propensity score matching with multiple imputation for missing values. Three-year overall survival (OS) and 3-year relapse-free survival (RFS) were compared, and the first recurrence site and complications were analysed. The numbers of eligible patients were 94 in the OPG and 144 in the ORG, and after matching, the number was 73 in each group. No significant difference was found in the 3-year OS rate (OPG: 78.9 vs. ORG: 78.9, P = 0.54) or the 3-year RFS rate (OPG: 77.8 vs. ORG: 68.2, P = 0.24). The proportions of peritoneal carcinomatosis and peritoneal dissemination as the first recurrence site and the rate and severity of complications were similar in the two groups. Omentectomy is not required for radical gastrectomy for AGC.

scholarly journals Duration of Perioperative Chemotherapy in Locally Advanced Gastric Cancer: A “Less Is More” Question When ypN0 Is Achieved

2021 ◽  
Vol 11 ◽  
Author(s):  
Zining Liu ◽  
Yinkui Wang ◽  
Fei Shan ◽  
Xiangji Ying ◽  
Yan Zhang ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Advanced Gastric Cancer ◽  
Cox Regression ◽  
Locally Advanced ◽  
R0 Resection ◽  
Perioperative Chemotherapy ◽  
Tree Model ◽  
Less Is More ◽  
Locally Advanced Gastric Cancer ◽  
Significant Difference

BackgroundsPerioperative chemotherapy (PEC) and neoadjuvant chemotherapy (NAC) have become a vital part of locally advanced gastric cancer (LAGC) treatment, but the optimal duration of PEC has not been studied. The aim of this study was to demonstrate the possibility of duration reduction in PEC in the adjuvant chemotherapy (AC) phase for ypN0 patients.MethodsWe included LAGC patients who achieved ypN0 after NAC in our institution from 2005 to 2018. The risk/benefit of AC and other covariates were majorly measured by overall survival (OS) and progression-free survival (PFS). We developed a survival-tree-based model to determine the optimal PEC duration for ypN0 patients in different classes.ResultsA total of 267 R0 resection patients were included. There were 55 patients who did not receive AC. The 5-year OS was 74.34% in the non-AC group and 83.64% in the AC group with a significant difference (p = 0.012). Multivariate Cox regression revealed that both AC (AC vs. non-AC: HR, 0.49; 95%CI, 0.27–0.88; p = 0.018) and ypT stages (ypT3-4 vs. ypT0-2: HR, 2.00; 95%CI, 1.11–3.59; p = 0.021) were significant protective/risk factors on patients OS and PFS. A decision tree model for OS indicated an optimal four to six cycles of PEC, which was recommended for ypT0-2N0 patients, while a minimum of five PEC cycles was recommended for ypT3-4N0 patients.ConclusionAC treatment is still necessary for ypN0. The duration reduction could be applied for the ypT0-2N0 stage patients but may not be suitable for higher ypT stages and beyond. A multicenter-based study is required.

scholarly journals The Safety and Efficacy of Laparoscopic Gastrectomy for Patients with Locally Advanced Gastric Cancer Following Neoadjuvant Chemotherapy

2020 ◽  
Author(s):  
Lihang Liu ◽  
Feng Li ◽  
Shengtao Lin ◽  
Yi Liu ◽  
Changshun Yang ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Postoperative Complications ◽  
Neoadjuvant Chemotherapy ◽  
Advanced Gastric Cancer ◽  
Laparoscopic Gastrectomy ◽  
Locally Advanced ◽  
R0 Resection ◽  
Resection Rate ◽  
Locally Advanced Gastric Cancer ◽  
Significant Difference

Abstract Background: Limited researches focused on the application of laparoscopic gastrectomy (LG) in locally advanced gastric cancer (LAGC) patients following neoadjuvant chemotherapy (NACT). In this study, we aimed at illustrating the surgical and survival outcome of LG in LAGC patients following NACT.Methods: We performed a retrospective study of patients with LAGC who received either LG following NACT or upfront LG at Fujian Provincial Hospital between March 2013 and October 2018. Perioperative parameters, short-term and long-term outcomes were compared. The Kaplan-Meier estimator was used to describe the survival curves, and the differences were examined by the log-rank test.Results: In total, 76 consecutive patients were enrolled into the NACT-LG (41 patients) and LG (35 patients) group, respectively. There was no significant difference between the two groups for baseline characteristics, including age, sex, BMI, Eastern Clinical Oncology Group performance status, tumor size, location, Borrmann type, Lauren type, differentiation, cT stage, and surgical type (all P>0.05). The surgical trauma in terms of incision length and blood loss, and postoperative recovery in terms of first aerofluxus time, first time on liquid diets, drainage duration, and hospital stays were similar between the two groups (all P>0.05). The operation time was significantly longer for NACT-LG than for LG (286.5 vs. 248.9 min, P=0.008). There was no significant difference in surgical morbidity (19.5% vs. 22.9%, P=0.721) between the two groups. No patient died of postoperative complications in the NACT-LG group, and one patient (1/35, 2.9%) died of postoperative complications in the LG group (P=0.461). After NACT, the R0 resection rate was significantly higher (95.1% vs. 77.1%, P=0.049), and metastatic lymph nodes were less for NACT-LG than for LG (1 vs. 8, P=0.001). Compared with the LG group, the NACT-LG group had a significantly better DFS (59.4% vs. 14.4%, P=0.034) and better OS (69.0% vs. 37.4%, P=0.009) at 3 years.Conclusions: NACT does not decrease safety of LG for patients with LAGC and offer higher R0 resection rate and better disease-free and overall survival. For patients with LAGC, LG following NACT should be the priority treatment.

scholarly journals The Effect of Neoadjuvant Therapies for Patients with Locally Advanced Gastric Cancer: A Propensity Score Matching Study

2021 ◽  
Vol 12 (2) ◽  
pp. 379-386
Author(s):  
Tongbo Wang ◽  
Yingtai Chen ◽  
Lulu Zhao ◽  
Hong Zhou ◽  
Chaorui Wu ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Propensity Score ◽  
Advanced Gastric Cancer ◽  
Propensity Score Matching ◽  
Locally Advanced ◽  
Locally Advanced Gastric Cancer

A single-arm, phase II feasibility study of neoadjuvant docetaxel, oxaliplatin, and S-1 (DOS) chemotherapy in potentially resectable gastric or gastroesophageal junction adenocarcinoma.

2011 ◽  
Vol 29 (4_suppl) ◽  
pp. 96-96
Author(s):  
M. Ryu ◽  
Y. Choi ◽  
B. Kim ◽  
Y. Park ◽  
H. Kim ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Neoadjuvant Chemotherapy ◽  
Advanced Gastric Cancer ◽  
Residual Disease ◽  
Gastroesophageal Junction ◽  
Locally Advanced ◽  
Phase Iii ◽  
R0 Resection ◽  
Locally Advanced Gastric Cancer ◽  
Grade 3

96 Background: The aim of this study was to evaluate feasibility and safety of neoadjuvant docetaxel, oxaliplatin, and S-1 (DOS) chemotherapy in patients with potentially resectable adenocarcinoma of stomach or gastroesophageal junction. Methods: Forty-one patients with clinical stage T3-4N0M0 or T2-4N+M0 determined by CT, endoscopic ultrasonography, and laparoscopy were enrolled between DEC 2008 and MAR 2010. Gastrectomy with D2 lymph node dissection was conducted after 3 cycles of DOS chemotherapy. DOS chemotherapy consists of docetaxel 50 mg/m2 iv (day1), oxaliplatin 100 mg/m2 iv (day1), and S-1 40 mg/m2 po bid (days1-14) at 3 weeks interval. After curative gastrectomy, the patients were given 1 year of adjuvant chemotherapy with S-1 (40 mg/m2 D1-28, every 6 weeks). Results: All patients finished the planned neoadjuvant chemotherapy. Twenty-three (56%) patients achieved a partial response, and the remaining 18 patients had stable disease by CT scan after 3 cycles of DOS chemotherapy. No disease progression was observed during the neoadjuvant chemotherapy. A median 4.7 weeks (range, 4.0-7.6) after the start of the 3rd cycle of DOS chemotherapy, 39 (95%) patients underwent R0 resection with no pathologic residual disease in 4 (10%) patients. Hematologic toxicities were common including grade 4 neutropenia (32%), grade 3 thrombocytopenia (17%), and febrile neutropenia (10%). However, hematologic toxicities were generally transient and manageable. There were no grade 3 or 4 non-hematologic toxicities with frequency > 5% of patients. With all toxicities taken together, 21 (51%) patients experienced grade 3 or 4 toxicities (except grade 3 neutropenia). There was no treatment-related death, and surgical complications included only mild wound problem in 4 (10%) patients. Conclusions: In this study, neoadjuvant DOS chemotherapy could induce a sufficient down-staging and R0 resection of locally advanced gastric cancer with mild and manageable toxicities. A phase III randomized trial is planned for evaluating the benefit of neoadjuvant DOS chemotherapy in patients with locally advanced gastric cancer. [Table: see text]

Apatinib combined with SOX neoadjuvant therapy for locally advanced gastric cancer: A multicenter, single-armed, prospective study.

2020 ◽  
Vol 38 (4_suppl) ◽  
pp. 367-367
Author(s):  
Jian-Xian Lin ◽  
Changming Huang
Keyword(s):  
Gastric Cancer ◽  
Prospective Study ◽  
Neoadjuvant Therapy ◽  
Advanced Gastric Cancer ◽  
Locally Advanced ◽  
Gastric Surgery ◽  
R0 Resection ◽  
Resection Rate ◽  
Locally Advanced Gastric Cancer ◽  
Tumor Response Evaluation

367 Background: Molecular targeted therapy has made great progress in the treatment of gastric cancer. In some previous studies, apatinib, an oral small molecular of VEGFR-2 TKI, had been confirmed can improve OS and PFS with an acceptable safety profile in patients with advanced gastric cancer refractory to two or more lines of prior chemotherapy. However, there is limited evidence about the safety and feasibility of apatinib combined with SOX regimen as neoadjuvant therapy for locally advanced gastric cancer (AGC). Methods: This is a multicenter, single-armed, prospective study. Patients with AGC (cT2-4N+M0) without prior anti-cancer strategies were included. Patients were received 2 to 5 cycles (21 days a cycle) of neoadjuvant therapy using S-1 (po, 40-60 mg bid, day1-day14), oxaliplatin (iv, 130 mg/m2, day1), and apatinib (po, 500 mg qd). Apatinib was prohibited in the last cycle. The operation should be performed 2 to 4 weeks later of the neoadjuvant therapy. The primary endpoint was R0 resection rate. The secondary endpoint included safety, ORR, and DCR. Results: A total of 56 patients from 10 centers in China were recruited. There were 43 males and 13 females. The median age was 63.04 years (range 41-75 years). There were 43 patients with tumor response evaluation, 29 patients (67.4%) had partial response (PR), 12 patients (27.9%) had stable disease (SD), and 2 patient (4.6%) had progressive disease (PD). The ORR and DCR were 67.4% (29/43) and 95.3% (41/43), respectively. 36 patients received gastric surgery, the R0 resection rate was 97.2%, 3 patients had postoperative complication: one had intestinal obstruction and 2 had pneumonia (all Clavien-Dindo classification less than grade II). 46 patients were included for safety analysis. The incidence of adverse events (AEs) and grade 3/4 AEs were 84.8% (39/46) and 17.4% (8/46), respectively. The most common AEs were neutropenia (40%), low platelet count (40%), leucopenia (32.6%), vomit (13%). Conclusions: This prospective study shows that neoadjuvant therapy using apatinib plus SOX brings clinical benefit to AGC with a high disease control rate and tolerable adverse reactions. Clinical trial information: NCT 03192735.

Neoadjuvant therapy for localized gastrointestinal stromal tumors (GISTs): A propensity score weighted analysis.

2020 ◽  
Vol 38 (15_suppl) ◽  
pp. e23516-e23516
Author(s):  
Kathryn E. Marqueen ◽  
Erin Moshier ◽  
Michael Buckstein ◽  
Celina Ang
Keyword(s):  
Overall Survival ◽  
Logistic Regression ◽  
Propensity Score ◽  
Survival Benefit ◽  
Postoperative Mortality ◽  
Phase Iii ◽  
R0 Resection ◽  
Treatment Groups ◽  
Significant Difference ◽  
The Impact

e23516 Background: Retrospective and single-arm prospective studies have reported clinical benefit associated with receipt of neoadjuvant imatinib for GISTs. In the absence of randomized phase III data, the impact of neoadjuvant systemic therapy (NAT) on survival, in comparison to upfront resection, remains unknown. Methods: We identified N = 14,402 patients with complete clinical, demographic, treatment and pathologic data within the National Cancer Database (2004-2016) who underwent resection of localized GIST of the stomach, esophagus, small bowel, and colorectum, with or without ≥3 months of NAT. Inverse probability of treatment weighting (IPTW) was used to adjust for covariable imbalance among treatment groups, with the propensity score estimated by logistic regression. The effect of NAT on overall survival was estimated with a weighted time-dependent Cox proportional hazards model. A weighted logistic regression was used to estimate the effect of NAT on 90-day postoperative mortality and R0 resection. Results: 759 (5.3%) patients received NAT followed by resection, compared to 13,643 (94.7%) who underwent upfront resection. Median length of NAT was 6.3 months. 53% of NAT patients were male vs. 49% of UR patients, 68% vs. 66% had primary gastric GIST, and 73% vs 49% were high risk. Patients receiving NAT had larger tumors (p < 0.001) and higher mitotic index (p = 0.003). There was a significant survival benefit associated with receipt of NAT (table). 90-day postoperative mortality rate was 3/759 (0.4%) among NAT patients vs. 307/13,643 (2.3%) UR patients. Receipt of NAT was significantly associated with lower odds of 90-day postoperative mortality (table). Of the 13,562 patients with information on margin status, the R0 resection rate was 635/716 (88.7%) for the neoadjuvant group vs. 11,823/12,846 (92%), with no significant difference between treatment groups (table). Conclusions: After adjustment for imbalance in prognostic and demographic factors, this analysis demonstrates that receipt of NAT for localized GIST is associated with a modest overall survival benefit. Although NAT patients had higher risk features, NAT was associated with a lower risk of 90-day postoperative mortality, with no difference in likelihood of achieving an R0 resection. [Table: see text]

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