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Korean J Clin Oncol ; 16(2): 63-70, 2020 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-36945715

RESUMEN

Purpose: Currently, trastuzumab plus chemotherapy is the standard first-line therapy for human epidermal growth factor receptor 2 (HER2)-positive advanced or metastatic gastric cancer (mGC) or esophagogastric junction cancer. However, it is not clear whether the prognosis of HER2-positive mGC treated with trastuzumab plus chemotherapy is better than that of HER2-negative mGC treated with chemotherapy as the first-line therapy. Methods: We performed a retrospective study comparing the prognosis of mGC according to first-line treatment with trastuzumab plus chemotherapy or chemotherapy only, at the Korea Cancer Center Hospital from 2011 to 2018. The Kaplan-Meier method and Cox proportional hazards model were used for univariate and multivariate survival analyses. Results: The median overall survival of trastuzumab group was 26.1 months and that of chemotherapy group was 14.8 months (P=0.047). Trastuzumab group had a longer median progression-free survival than chemotherapy group (23.4 vs. 9.2 months, P=0.026). By univariate analysis, sex, age, World Health Organization (WHO) histology, HER2 status, primary tumor site, extent of disease, number of lesions, number of metastatic, measurability of disease, prior gastrectomy, and chemotherapy group are statistically significant. Using multivariate analysis, number of lesions, number of metastatic, prior gastrectomy, and trastuzumab group (hazard ratio, 0.594; 95% confidence interval, 0.384-0.921; P=0.020) were found to be independent prognostic factors of overall survival. Conclusion: The result suggests prognosis of HER2-positive mGC treated by trastuzumab plus chemotherapy could be better than that of HER2-negative mGC treated by chemotherapy only. Well-designed prospective cohort studies are needed to confirm the results of this study. HER2 testing should be performed routinely in all patients newly diagnosed with mGC.

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