The new effective systemic treatment strategy has "created" many long-term stage Ⅳ non-small cell lung cancer (NSCLC) survivors, and surgeons should pay attention to those individual ineffective lesions of long-term survivors. Besides, the new effective systemic treatment strategy may have changed the original concept and population of oligometasis. To intervene the oligo-progression lesions of long-term stage Ⅳ survivors, particularly after effective systemic treatment, at appropriate time with appropriate way might be the main task of surgery in the future.
Local treatment improves the outcomes for oligometastatic disease, an intermediate state between locoregional and widespread disease. However, consensus about the definition, diagnosis and treatment of oligometastatic oesophagogastric cancer is lacking. The first edition "Definition, diagnosis and treatment of oligometastatic oesophagogastric cancer: A Delphi consensus study in Europe" was published on February 15, 2023 by 65 European medical specialists. In this article, the consensus will be interpreted to provide new idea for the diagnosis and treatment of oligometastatic oesophagogastric cancer for Chinese clinicians.