How long middle-aged people survive after developing gastric cancer mainly depends on the pathological stage of gastric cancer and its pathological type. Generally speaking, as the most common malignant tumor, the first choice of clinical treatment for stomach cancer is radical surgical resection with postoperative chemotherapy. According to clinical statistics, for early gastric cancer, i.e., Stage I gastric cancer, the 5-year survival rate can reach 80% or even higher, while for progressive gastric cancer, i.e., Stage II and Stage III gastric cancer, the 5-year survival rate is usually 30%-60%, and for Stage IV gastric cancer, i.e., advanced gastric cancer, the 5-year survival rate is usually less than 5%. For the same pathological stage, the worse the differentiation degree is, the lower the probability of cure is. Therefore, how long middle-aged people survive in gastric cancer mainly depends on their pathological stage and pathological type.