How to define advanced gastric cancer? In other words, to what extent is gastric cancer advanced? It is advanced gastric cancer if any one of the following conditions is met: 1. gastric cancer that cannot be removed surgically; 2. gastric cancer with metastasis from other parts. Family members of patients often ask how long can advanced gastric cancer live? Most patients with advanced gastric cancer live 3-4 months without treatment. If chemotherapy is given, they can live for about 10 months. If it is Her-2 positive gastric cancer, targeted + chemotherapy, you can live 13 months. Again, the question arises, is it true that as long as chemotherapy is given, patients with advanced gastric cancer will definitely live up to 10 months? That is not true. Let’s take an example to illustrate this problem. The average life expectancy of Shanghai men is 80 years, but it does not mean that every man living in Shanghai can live to 80 years, nor can we say that Shanghai men can only live to 80 years. You can only say that if you don’t live to 80, you lose most people in this race of life, and if you live longer than 80, you win most people in this race.