Patients with stage IIIA gastric poorly differentiated adenocarcinoma are clinically evaluated as surgically treatable, and postoperative adjuvant chemotherapy treatment is recommended. For T2 or above that can be surgically resected or with lymph node metastasis, neoadjuvant chemotherapy is preferred. 1. Surgery is the main treatment for stage IIIA gastric poorly differentiated cancer, and postoperative adjuvant chemotherapy is recommended. 2. There are various postoperative adjuvant chemotherapy regimens, commonly used drugs such as oxaliplatin and capecitabine. 3. Preoperative neoadjuvant chemotherapy: for T2 or above that can be surgically resected or accompanied by lymph node metastasis, neoadjuvant chemotherapy is preferred, and if the tumor is stable or in remission, it will be evaluated and then surgically treated. Stage IIIA gastric low-differentiated cancer, it is recommended to go to the hospital to get a clear diagnosis and treatment, and not to take medication by oneself to avoid delaying the condition.