Abstract
Abstract Background Oligometastatic gastroesophageal cancer is a clinical entity with no standard treatment recommendation. Treatment with curative intent has recently emerged as an option in selected patients in contrast to the traditional palliative treatment strategy. This prospective study aimed to assess the safety and efficacy of combined systemic and local treatment with curative intent for patients with oligometastatic gastroesophageal cancer. Methods In a multicenter collaborative study, consecutive patients with gastroesophageal cancer and metastases in the liver and/or extra-regional lymph nodes were screened for inclusion. Eligible patients were offered treatment with combined systemic and local therapy within the study. Primary endpoints were treatment safety and feasibility, secondary outcomes included postoperative mortality, treatment response, progression-free and overall survival. Subgroup analyses were stratified based on oligometastatic location. Results A total of 29/35 patients completed systemic and local treatment with surgical resection, liver ablation or definitive chemoradiotherapy. The majority of postoperative complications were mild-moderate, no patient died due to postoperative complications within 30 days of surgery. Median progression-free survival was 7.1 (interquartile range 4.3-12.4) months and median overall survival was 23.8 (interquartile range 12.3-33.0) months. Conclusion This study found combined systemic and local treatment to be a safe treatment option and to potentially improve long-term survival in strictly selected patients with oligometastatic gastroesophageal cancer.
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