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Perioperative immune checkpoint inhibitors with chemotherapy increase pathological complete response rate by 2.91 RRImmune Checkpoint Inhibitors Combined With Chemotherapy Improve Cancer Response

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Key Takeaway
Note that perioperative immune checkpoint inhibitors with chemotherapy significantly increase pCR in resectable gastric cancer.

This meta-analysis synthesized data from randomized controlled trials involving 3252 patients with resectable gastric and gastroesophageal junction (GEJ) cancer. The study compared perioperative immune checkpoint inhibitors combined with chemotherapy against chemotherapy alone as a primary treatment strategy.

The primary finding indicates that the addition of immune checkpoint inhibitors to chemotherapy significantly improves pathological complete response (pCR) rates, with a reported relative risk of 2.91 (95% CI: 2.16 to 3.93). While survival endpoints such as event-free survival and overall survival were listed as primary outcomes, specific data for these metrics were not provided in the results summary.

Safety data was assessed during the trials; however, specific adverse events, serious adverse events, or discontinuation rates were not reported. The study does not provide specific information regarding clinical practice limitations or follow-up durations. These findings suggest a potential benefit for pCR in this patient population, though survival benefits remain unquantified in this analysis.

How this fits prior evidence

This meta-analysis addresses a gap in the management of resectable gastric and gastroesophageal junction cancer by evaluating perioperative immune checkpoint inhibitor combinations. While previous evidence noted that AI models provide superior prediction of neoadjuvant chemotherapy response compared to traditional methods, this study provides specific data on the efficacy of adding immune checkpoint inhibitors to improve pathological complete response rates.

A meta-analysis looked at the results of clinical trials involving 3,252 patients with resectable gastric or gastroesophageal junction cancer. Researchers compared two different treatment paths: using only chemotherapy versus combining chemotherapy with immune checkpoint inhibitors (ICIs) before surgery.

The analysis found that patients who received both chemotherapy and ICIs had a significantly higher rate of pathological complete response compared to those who received chemotherapy alone. This specific measurement helps doctors understand how well the tumor responded to treatment during the surgical preparation phase.

While the study looked at safety, it did not provide specific data on side effects or adverse events in its results summary. Because this is a meta-analysis of existing trials, the findings show a link between combined therapy and better response rates for these specific cancers. Patients should talk to their doctors to see if these combinations are appropriate for their specific diagnosis.

What this means for you:
Combining immune checkpoint inhibitors with chemotherapy showed higher response rates in certain stomach and esophageal cancers.

Common questions

What did the study find about combining treatments?

The meta-analysis of 3,252 patients found that adding immune checkpoint inhibitors to chemotherapy significantly improved pathological complete response rates compared to using chemotherapy alone. This finding specifically relates to patients with resectable gastric or gastroesophageal junction cancer.

Is this treatment safe for stomach cancer patients?

The study included a review of safety, but the specific results did not provide data on adverse events, side effects, or how well the treatments were tolerated. You should speak with your doctor to discuss the risks and benefits of these specific medications.

Who specifically can benefit from this combination?

The findings are based on patients with resectable gastric cancer or gastroesophageal junction (GEJ) cancer. The study focused on how these combinations performed compared to chemotherapy alone in those specific groups.

Study Details

Study typeMeta analysis
EvidenceLevel 1
PublishedAug 2026
View Original Abstract ↓
BackgroundThe efficacy and safety of perioperative immune checkpoint inhibitors (ICIs) combined with chemotherapy for resectable gastric/gastroesophageal junction (GEJ) cancer remain to be definitively established. This meta-analysis aimed to synthesize the latest evidence from randomized controlled trials (RCTs) on this emerging therapeutic strategy.MethodsA systematic literature search was conducted in PubMed, Embase, and the Cochrane Library up to June 2026 for RCTs comparing perioperative ICI plus chemotherapy with chemotherapy alone in patients with resectable gastric/GEJ cancer. Primary outcomes included pathological complete response (pCR), R0 resection rate, and survival endpoints (event-free survival [EFS] and overall survival [OS]). Safety was assessed by the incidence of adverse events. Pooled risk ratios (RRs), hazard ratios (HRs), and 95% confidence intervals (CIs) were calculated using random-effects models.ResultsSeven RCTs comprising 3252 patients were included. The addition of ICIs to chemotherapy significantly improved the pCR rate compared to chemotherapy alone (RR: 2.91, 95% CI: 2.16 to 3.93, P 
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