scholarly journals Addition of Docetaxel to Oral Fluoropyrimidine Improves Efficacy in Patients With Stage III Gastric Cancer: Interim Analysis of JACCRO GC-07, a Randomized Controlled Trial

2019 ◽  
Vol 37 (15) ◽  
pp. 1296-1304 ◽  
Author(s):  
Kazuhiro Yoshida ◽  
Yasuhiro Kodera ◽  
Mitsugu Kochi ◽  
Wataru Ichikawa ◽  
Yoshihiro Kakeji ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Adjuvant Chemotherapy ◽  
Interim Analysis ◽  
Hazard Ratio ◽  
Phase Iii ◽  
Stage Iii ◽  
Rank Test ◽  
R0 Resection ◽  
Relapse Free Survival ◽  
Free Survival

PURPOSE S-1 is a standard postoperative adjuvant chemotherapy for patients with stage II or III gastric cancer in Asia. Neoadjuvant or perioperative strategies dominate in Western countries, and docetaxel has recently shown significant survival benefits when combined with other standard regimens in advanced cancer and perioperative settings. PATIENTS AND METHODS This randomized phase III study was designed to prove the superiority of postoperative S-1 plus docetaxel over S-1 alone for R0 resection of pathologic stage III gastric cancer. The sample size of 1,100 patients was necessary to detect a 7% increase in 3-year relapse-free survival as the primary end point (hazard ratio, 0.78; 2-sided α = .05; β = .2). RESULTS The second interim analysis was conducted when the number of events reached 216 among 915 enrolled patients (median follow-up, 12.5 months). Analysis demonstrated the superiority of S-1 plus docetaxel (66%) to S-1 (50%) for 3-year relapse-free survival (hazard ratio, 0.632; 99.99% CI, 0.400 to 0.998; stratified log-rank test, P < .001), and enrollment was terminated as recommended by the independent data and safety monitoring committee. Incidences of grade 3 or greater adverse events, particularly neutropenia and leukopenia, were higher in the S-1 plus docetaxel group, but all events were manageable. CONCLUSION Addition of docetaxel to S-1 is effective with few safety concerns in patients with stage III gastric cancer. The present findings may also be applicable in countries in which perioperative adjuvant chemotherapy or chemoradiation is not standard.

Randomized Trial of Adjuvant Chemotherapy With Mitomycin, Fluorouracil, and Cytosine Arabinoside Followed by Oral Fluorouracil in Serosa-Negative Gastric Cancer: Japan Clinical Oncology Group 9206–1

2003 ◽  
Vol 21 (12) ◽  
pp. 2282-2287 ◽  
Author(s):  
Atsushi Nashimoto ◽  
Toshifusa Nakajima ◽  
Hiroshi Furukawa ◽  
Masatsugu Kitamura ◽  
Taira Kinoshita ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Overall Survival ◽  
Adjuvant Chemotherapy ◽  
Survival Benefit ◽  
Curative Resection ◽  
Cancer Recurrence ◽  
Phase Iii ◽  
Relapse Free Survival ◽  
Free Survival ◽  
Significant Difference

Purpose: To evaluate the survival benefit of adjuvant chemotherapy after curative resection in serosa-negative gastric cancer patients (excluding patients who were T1N0), we conducted a multicenter phase III clinical trial in which 13 cancer centers in Japan participated. Patients and Methods: From January 1993 to December 1994, 252 patients were enrolled into the study and allocated randomly to adjuvant chemotherapy or surgery alone. The chemotherapy comprised intravenous mitomycin 1.33 mg/m2, fluorouracil (FU) 166.7 mg/m2, and cytarabine 13.3 mg/m2 twice weekly for the first 3 weeks after surgery, and oral FU 134 mg/m2 daily for the next 18 months for a total dose of 67 g/m2. The primary end point was relapse-free survival. Overall survival and the site of recurrence were secondary end points. Results: Ninety-eight percent of patients underwent gastrectomy with D2 or greater lymph node dissection. There were no treatment-related deaths and few serious adverse events. There was no significant difference in relapse-free and overall survival between the arms (5-year relapse-free survival 88.8% chemotherapy v 83.7% surgery alone; P = .14 and 5-year survival 91.2% chemotherapy v 86.1% surgery alone; P = .13, respectively). Nine patients (7.1%) in the chemotherapy arm and 17 patients (13.8%) in the surgery-alone arm had cancer recurrence. Conclusion: There was no statistically significant relapse-free or overall survival benefit with this adjuvant chemotherapy for patients with macroscopically serosa-negative gastric cancer after curative resection, and there was no statistical difference between the two arms relating to the types of cancer recurrence. We do not recommend adjuvant chemotherapy with this regimen for this population in clinical practice.

Randomized phase III trial of standard D2 versus D2 + para-aortic lymph node (PAN) dissection (D) for clinically M0 advanced gastric cancer: JCOG9501

2006 ◽  
Vol 24 (18_suppl) ◽  
pp. LBA4015-LBA4015 ◽  
Author(s):  
M. Sasako ◽  
T. Sano ◽  
S. Yamamoto ◽  
A. Nashimoto ◽  
A. Kurita ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Advanced Gastric Cancer ◽  
Disease Free Survival ◽  
Operation Time ◽  
Hazard Ratio ◽  
Phase Iii ◽  
Rank Test ◽  
R0 Resection ◽  
Eligibility Criteria ◽  
Curative Intent

LBA4015 Background: The INT-0116 study proved the efficacy of radiochemotherapy after R0 resection for gastric cancer and thus the importance of the local control and the insufficiency of D0/1 surgery. Recently D2 surgery was for the first time proven to improve the survival compared with D1 in a Taiwanese RCT (Lancet Oncol 2006). In our study, D2+PAND was compared with D2 in a RCT. Low operative mortality has been reported (Sano et al. J Clin Oncol 2004) and we now present the survival results. Methods: Eligibility criteria included; histologically proven adenocarcinoma, cT2b-T4, cM0, no macroscopic metastasis to the PAN, negative lavage cytology, adequate organ function, and age <76. Linitis plastica was excluded. Eligible pts were randomly assigned to D2 with or without PAND during surgery. All patients were followed without adjuvant therapy until recurrence. The primary endpoint was overall survival (OS) to be compared by stratified log-rank test. Assuming 256 eligible pts in each arm, the study had 75% power to detect 0.73 hazard ratio for D2+PAND to D2 in OS at 0.05 one-sided alpha. Results: Between 07/1995 and 04/2001, 523 pts were randomized (263 to D2 and 260 to D2+PAND). Baseline characteristics were well balanced between the arms. At the time of the final analysis on 23/03/06, 191 (96 and 95, in D2 and D2+PAND, respectively) had died. The 3- and 5-year OS were 76% and 69% in D2 and 76% and 70% in D2+PAND, respectively (p = 0.57, Hazard ratio was 1.03 (95% CI: 0.77–1.37)). Disease free survival did not show any difference between the groups as well. Median operation time was 63 minutes longer and median blood loss was 230 ml larger in D2+PAND than in D2. There was no difference in the incidence of major surgical complications and hospital mortality (0.8% in both arms). Conclusions: D2 or D2+PAND could be carried out safely and showed excellent survival for advanced gastric cancer treated with curative intent. PAND could not improve the survival achieved by D2. General use of PAND should be avoided. No significant financial relationships to disclose.

Survival analysis of adjuvant chemotherapy with S-1 plus cisplatin for stage III gastric cancer.

2012 ◽  
Vol 30 (4_suppl) ◽  
pp. 107-107 ◽  
Author(s):  
Daisuke Takahari ◽  
Tetsuya Hamaguchi ◽  
Kenichi Yoshimura ◽  
Hitoshi Katai ◽  
Seiji Ito ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Survival Rate ◽  
Adjuvant Chemotherapy ◽  
Survival Rates ◽  
Phase Iii ◽  
Stage Iii ◽  
Recurrence Free Survival ◽  
Stage Iiia ◽  
Free Survival ◽  
Post Surgery

107 Background: The efficacy of S-1 for stage II-III gastric cancer has been shown. However, the survival of stage III remains unsatisfactory (the 3-year recurrence free survival rates in stage IIIA and IIIB receiving S-1 were 68.0% and 49.8%, respectively). We already reported the feasibility of S-1 plus cisplatin as adjuvant chemotherapy for Stage III gastric cancer after curative resection (ASCO-GI 2009, Cancer Chemother Pharmacol 2011). Here we evaluate the recurrence and survival as secondary endpoints. Methods: Japanese patients with stage III gastric cancer who underwent D2 gastrectomy were enrolled. Treatment consisted of 3 cycles of S-1 (40 mg/m2 po) twice daily on days 1-21 and CDDP (60 mg/m2 iv) on day 8 and S-1 monotherapy was given on days 1-28 every 6 weeks until 1 year post surgery. Results: From August 2007 to September 2009, 63 patients were accrued. 35 patients were stage IIIA, the rest 28 patients were IIIB. After a median follow-up 2.9 years, 15 patients experienced recurrence, and 12 patients died. The 3-year recurrence free survival rate was 76.4% (95%CI:63.0-85.4%, IIIA 88.8%, IIIB 60.1%). The 3-year overall survival rate was 78.5% (95%CI:63.4-87.9%, IIIA 85.0%, IIIB 71.9%). The site of recurrence was mainly peritoneum (n=10), liver (n=3), and lymph node (n=3). Conclusions: Our results indicated that adjuvant therapy with S-1 plus 3 cycles of cisplatin may reduce recurrence and improve survival of stage III gastric cancer. This treatment should be considered as an experimental arm comparing with S-1 monotherapy for the next postoperative adjuvant phase III trial.

Phase II feasibility study of adjuvant S-1 plus docetaxel for stage III gastric cancer patients after curative D2 gastrectomy (OGSG 0604)

2009 ◽  
Vol 27 (15_suppl) ◽  
pp. e15567-e15567
Author(s):  
K. Fujitani ◽  
S. Tamura ◽  
Y. Kimura ◽  
T. Tsuji ◽  
J. Matsuyama ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Adjuvant Chemotherapy ◽  
Phase Ii ◽  
Performance Status ◽  
Progression Free Survival ◽  
Phase Iii ◽  
Stage Iii ◽  
R0 Resection ◽  
D2 Gastrectomy ◽  
Grade 3

e15567 Background: Although an adjuvant chemotherapy with S-1 has become the standard treatment for stage II-III gastric cancer (GC) patients (pts) after curative D2 gastrectomy in Japan, the survival benefit for stage III pts obtained by S-1 is considered to be modest. S-1 plus docetaxel has shown a good response rate of 56% with prolonged median overall survival (OS) of 14.3 months in pts with advanced GC. This phase II study evaluated the feasibility and safety of adjuvant S-1 plus docetaxel for stage III GC pts after R0 resection. Methods: Patients with curatively resected pathological stage III GC receiving D2 dissection, age 20–80 years, performance status < 1, no prior adjuvant treatment, adequate organ function, and informed consent were given S-1 (80 mg/m2/day) orally for consecutive 2 weeks plus docetaxel (40 mg/m2) intravenously on day 1, repeated every 3 weeks. The treatment was started within 45 days after gastrectomy, and repeated for 4 cycles, followed by S-1 monotherapy until 1 year after surgery. Study endpoints included feasibility of the 4 cycles of S-1 plus docetaxel as primary, and safety, progression free survival (PFS), and OS as secondary. Sample size was set to be 50, which was determined to reject the feasibility of 50% under the expectation of 75% with power of 90% and two-sided α of 5%. Results: Fifty-three pts, 42 males and 11 females with a median age of 65 years, were enrolled between 5/2007 and 8/2008. Pathological stages included IIIA in 36 pts and IIIB in 17 pts. Planned 4 cycles of treatment were delivered to 41 out of 53 pts, with the feasibility of 77.4% (95% CI 63.8–87.7%, P<0.001). Reasons for discontinuation were recurrent cancer in 1 pt, adverse events in 10, and miscellaneous in 1, respectively. Grade 4 neutropenia was observed in 28% of pts with grade 3 febrile neutropenia in 9%. Non-hematological toxicities of grade 3 or more involved fatigue in 6%, anorexia in 9%, and nausea in 6%. No treatment-related deaths occurred. Conclusions: Adjuvant S-1 plus docetaxel was well-tolerated and showed good compliance. Although follow-up is ongoing on survival, this regimen could be a candidate of future phase III trial seeking for the optimal adjuvant chemotherapy for stage III GC pts after curative D2 gastrectomy. No significant financial relationships to disclose.

scholarly journals Survival analysis of elderly patients over 65 years old with stage II/III gastric cancer treated with adjuvant chemotherapy after laparoscopic D2 gastrectomy: a retrospective cohort study

BMC Cancer ◽  
2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Yanrui Liang ◽  
Liying Zhao ◽  
Hao Chen ◽  
Tian Lin ◽  
Tao Chen ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Cohort Study ◽  
Adjuvant Chemotherapy ◽  
Elderly Patients ◽  
Retrospective Cohort ◽  
Stage Iii ◽  
Rank Test ◽  
Oral Capecitabine ◽  
D2 Gastrectomy ◽  
Log Rank Test

Abstract Background The benefits of adjuvant chemotherapy for elderly patients with gastric cancer (GC) remain unknown because elderly patients are underrepresented in most clinical trials. This study aimed to evaluate the effectiveness and complications of adjuvant chemotherapy in patients > 65 years of age after laparoscopic D2 gastrectomy. Methods This was a single-center retrospective cohort study of elderly patients (> 65 years) with stage II/III GC who underwent curative laparoscopic D2 gastrectomy with R0 resection between 2004 and 2018. The adjuvant chemotherapy regimens included monotherapy (oral capecitabine) and doublet chemotherapy (oral capecitabine plus intravenous oxaliplatin [XELOX] or intravenous oxaliplatin, leucovorin, and 5-fluorouracil [FOLFOX]). The data were retrieved from a prospectively registered database maintained at the Department of General Surgery in Nanfang Hospital, China. The patients were divided as surgery alone and surgery plus adjuvant chemotherapy (chemo group). The overall survival (OS), disease-free survival (DFS), chemotherapy duration, and toxicity were examined. Results There were 270 patients included: 169 and 101 in the surgery and chemo groups, respectively. There were 10 (10/101) and six (6/101) patients with grade 3+ non-hematological and hematological adverse events. The 1−/3−/5-year OS rates of the surgery group were 72.9%/51.8%/48.3%, compared with 90.1%/66.4%/48.6% for the chemo group (log-rank test: P = 0.018). For stage III patients, the 1−/3−/5-year OS rates of the surgery group were 83.7%/40.7%/28.7%, compared with 89.9%/61.2%/43.6% for the chemo group (log-rank test: P = 0.015). Adjuvant chemotherapy was significantly associated with higher OS (HR = 0.568, 95%CI: 0.357–0.903, P = 0.017) and DFS (HR = 0.511, 95%CI: 0.322–0.811, P = 0.004) in stage III patients. Conclusions This study suggested that adjuvant chemotherapy significantly improves OS and DFS compared with surgery alone in elderly patients with stage III GC after D2 laparoscopic gastrectomy, with a tolerable adverse event profile.

Three Versus 6 Months of Oxaliplatin-Based Adjuvant Chemotherapy for Patients With Stage III Colon Cancer: Disease-Free Survival Results From a Randomized, Open-Label, International Duration Evaluation of Adjuvant (IDEA) France, Phase III Trial

2018 ◽  
Vol 36 (15) ◽  
pp. 1469-1477 ◽  
Author(s):  
Thierry André ◽  
Dewi Vernerey ◽  
Laurent Mineur ◽  
Jaafar Bennouna ◽  
Jérôme Desrame ◽  
...  
Keyword(s):  
Colon Cancer ◽  
Adjuvant Chemotherapy ◽  
Health Care Providers ◽  
Disease Free Survival ◽  
Phase Iii ◽  
Stage Iii ◽  
Care Providers ◽  
Free Survival ◽  
Stage Iii Colon Cancer ◽  
Disease Free

Purpose Reduction of adjuvant treatment duration may decrease toxicities without loss of efficacy in stage III colon cancer. This could offer clear advantages to patients and health care providers. Methods In International Duration Evaluation of Adjuvant Chemotherapy (IDEA) France, as part of the IDEA international collaboration, patient with colon cancer patients were randomly assigned to 3 and 6 months of modified FOLFOX6 (mFOLFOX6: infusional fluorouracil, leucovorin, and oxaliplatin) or capecitabine plus oxaliplatin (CAPOX) by physician choice. The primary end point was disease-free survival (DFS), and analyses were descriptive. Results A total of 2,010 eligible patients received either 3 or 6 months of chemotherapy (modified intention-to-treat population); 2,000 (99%) had stage III colon cancer (N1: 75%, N2: 25%); 1,809 (90%) received mFOLFOX6, and 201 (10%) received CAPOX. The median age was 64 years, and the median follow-up time was 4.3 years. Overall, 94% (3 months) and 78% (6 months) of patients completed treatment (fluoropyrimidines ± oxaliplatin). Maximal grade 2 and 3 neuropathy rates were 28% and 8% in the 3-month arm and 41% and 25% in the 6-month arm ( P < .001). Final rates of residual neuropathy greater than grade 1 were 3% in the 3-month arm and 7% in the 6-month arm ( P < .001). There were 578 DFS events: 314 and 264 in the 3- and 6-month arms, respectively. The 3-year DFS rates were 72% and 76% in the 3- and 6-month arms, respectively (hazard ratio [HR], 1.24; 95% CI, 1.05 to 1.46; P = .0112). In the 3 and 6-month arms, respectively, for patients who received mFOLFOX6, the 3-year DFS rates were 72% and 76% (HR, 1.27; 95% CI, 1.07 to 1.51); for the T4 and/or N2 population, they were 58% and 66% (HR, 1.44; 95% CI, 1.14 to 1.82); and for the T1-3N1 population, they were 81% and 83% (HR, 1.15; 95% CI, 0.89 to 1.49). Conclusion IDEA France, in which 90% of patients received mFOLFOX6, shows superiority of 6 months of adjuvant chemotherapy compared with 3 months, especially in the T4 and/or N2 subgroups. These results should be considered alongside the international IDEA collaboration data.

scholarly journals Efficacy of aspirin for stage III colorectal cancer: a randomized double-blind placebo-controlled trial (JCOG1503C, EPISODE-III trial)

2019 ◽  
Vol 49 (10) ◽  
pp. 985-990 ◽  
Author(s):  
Kenichi Miyamoto ◽  
Atsuo Takashima ◽  
Junki Mizusawa ◽  
Yuya Sato ◽  
Yasuhiro Shimada ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Adjuvant Chemotherapy ◽  
Adverse Events ◽  
Curative Resection ◽  
Disease Free Survival ◽  
Phase Iii ◽  
Stage Iii ◽  
Double Blind ◽  
Free Survival ◽  
Double Blind Placebo

Abstract Adjuvant chemotherapy is the current standard treatment for stage III colorectal cancer after curative resection. However, the prognosis of stage III colorectal cancer is still poor even after curative resection and adjuvant chemotherapy. Several observational studies suggested that the anti-tumor effect of aspirin. Therefore, we planned a randomized double-blind placebo-controlled phase III trial, which commenced in Japan in March 2018, to confirm the superiority of aspirin over placebo added to adjuvant chemotherapy in terms of disease-free survival (DFS) for stage III colorectal cancer patients after curative resection. A total of 880 patients will be accrued from 20 Japanese institutions within 3 years. The primary endpoint is DFS and the secondary endpoints are overall survival, relapse-free survival, relative dose intensity, adverse events, and serious adverse events. This trial has been registered at Japan Registry of Clinical Trials as jRCTs031180009 (https://jrct.niph.go.jp/detail/589).

Randomized Clinical Trial of Adjuvant Mitomycin Plus Tegafur in Patients With Resected Stage III Gastric Cancer

1999 ◽  
Vol 17 (12) ◽  
pp. 3810-3815 ◽  
Author(s):  
Lluís Cirera ◽  
Anna Balil ◽  
Eduard Batiste-Alentorn ◽  
Ignasi Tusquets ◽  
Teresa Cardona ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Clinical Trial ◽  
Overall Survival ◽  
Survival Rate ◽  
Adjuvant Chemotherapy ◽  
Disease Free Survival ◽  
Stage Iii ◽  
Free Survival ◽  
Resected Stage ◽  
Disease Free

PURPOSE: The efficacy of adjuvant chemotherapy in gastric cancer is controversial. We conducted a phase III, randomized, multicentric clinical trial with the goal of assessing the efficacy of the combination of mitomycin plus tegafur in prolonging the disease-free survival and overall survival of patients with resected stage III gastric cancer. PATIENTS AND METHODS: Patients with resected stage III gastric adenocarcinoma were randomly assigned, using sealed envelopes, to receive either chemotherapy or no further treatment. Chemotherapy was started within 28 days after surgery according to the following schedule: mitomycin 20 mg/m2 intravenously (bolus) at day 1 of chemotherapy; 30 days later, oral tegafur at 400 mg bid daily for 3 months. Disease-free survival and overall survival were estimated using the Kaplan-Meier analysis and the Cox proportional hazards model. RESULTS: Between January 1988 and September 1994, 148 patients from 10 hospitals in Catalonia, Spain, were included in the study. The median follow-up period was 37 months. The tolerability of the treatment was excellent. The overall survival and disease-free survival were higher in the group of patients treated with chemotherapy (P = .04 for survival and P = .01 for disease-free survival in the log-rank test). The overall 5-year survival rate and the 5-year disease-free survival rate were, respectively, 56% and 51% in the treatment group and 36% and 31% in the control group. CONCLUSION: Our positive results are consistent with the results of recent studies; which conclude that there is a potential benefit from adjuvant chemotherapy in resected gastric cancer.

Does microsatellite instability predict the effect of adjuvant chemotherapy in stage III colorectal cancer? A meta-analysis

2009 ◽  
Vol 27 (15_suppl) ◽  
pp. 4121-4121
Author(s):  
G. Des Guetz ◽  
B. Uzzan ◽  
P. Nicolas ◽  
K. Chouahnia ◽  
G. Perret ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Adjuvant Chemotherapy ◽  
Microsatellite Instability ◽  
Colorectal Neoplasm ◽  
Meta Analysis ◽  
Stage Iii ◽  
Relapse Free Survival ◽  
Free Survival ◽  
Electronic Search ◽  
Survival Difference

4121 Background: Microsatellite instability (MSI) is a prognostic factor in colorectal cancer. Whether it predicts the effect of adjuvant chemotherapy (CT) on overall survival (OS) and relapse-free survival (RFS) is controversial. Methods: Studies were identified by an electronic search using online PubMed, with simultaneous keywords (colorectal neoplasm, microsatellite instability, chemotherapy, prognosis). Abstracts from ASCO and AACR proceedings were reviewed. Articles were obtained from cross-checking of references and from a previous prognostic meta-analysis (MA) (Popat, 2005). We used EasyMA software, available online. A Hazard Ratio (HR) < 1 for MSI-high (MSI-H) status compared with microsatellite stable (MSS) meant a better survival. Results: Our MA found 21 studies (4 abstracts). Statistical calculations were performed in 11 studies (5087 patients including 2879 receiving 5FU-based CT; mean age: 63 years; 1489 stage II, 2648 stage III (64%)). MSI-H was found in 644 patients (15% of total), MSS in 3624. Seven studies (2 randomized) assessed 2 cohorts receiving or not adjuvant CT, 4 studies only included patients receiving CT. Global HR OS (9 studies) was 0.79 (95% confidence interval or CI: 0.64–0.98; p = 0.03). Global HR RFS (8 studies) was 0.67 (95% CI: 0.54–0.83; p < 0.001). A MA on stage III patients (4 studies, 719 patients, 137 MSI-H) found a higher survival among MSI-H than MSS patients receiving CT (HR OS: 0.71, 95% CI 0.49–1.03; HR RFS 0.56, 95% CI 0.42–0.75). Interaction between MSI status and CT status was statistically significant on OS and RFS (4 studies). A MA among MSI-H patients (7 studies) found no survival difference between patients under CT or not: HR OS: 0.70 (95% CI 0.44–1.09), HR RFS: 0.96 (95% CI: 0.62–1.49). Conclusions: Adjuvant CT significantly improved survival in MSI-H compared with MSS patients. MSI-H stage III patients receiving CT survived more than MSS. MSI-H status did not predict response to CT compared with no treatment. No significant financial relationships to disclose.

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