Stage 1a gastric cancer has a better prognosis and a greater possibility of cure after active treatment compared with higher clinical stages, so it is recommended to actively perform surgery and other treatments. Stage 1a gastric cancer is one of the TNM stages, which means that the tumor diameter is relatively small and only locally infiltrated, which is early gastric cancer. At this time, the tumor does not have distant and lymphatic metastasis, the clinical stage is early and the lesion is limited. This stage is an indication for endoscopic treatment of early gastric cancer, through which the tumor can be controlled by removing less gastric tissue, usually without chemotherapy or radiotherapy. The prognosis is relatively better and the five-year survival rate is higher compared to other higher-stage tumors. Regardless of the stage of the tumor, aggressive treatment is needed. If gastric cancer is suspected, it is advisable to seek prompt medical attention.