The treatments for endometrial cancer IIIa include surgery, radiotherapy, chemotherapy and so on. 1. Surgical treatment: when endometrial cancer is in stage IIIa, surgery is needed immediately after removing the lesions that can be measured by naked eyes in order to slow down the progress of the disease. Secondly, the resection specimen should be subjected to estrogen and progesterone receptor test in order to provide therapeutic direction for subsequent adjuvant therapy. 2. Radiotherapy: it is mainly divided into intra-pelvic irradiation and extracorporeal irradiation, which can control the cancerous foci and delay the recurrence of endometrial cancer. 3. Chemotherapy: this method can be used for endometrial cancer stage IIIa, which can effectively reduce the distant metastasis of cancer cells, commonly used drugs include cisplatin, carboplatin, paclitaxel, doxorubicin, etc. The medical staff will match the targeted drugs with specific conditions for chemotherapy, and it is recommended to take good care of the patients in daily life. Endometrial cancer in stage IIIa indicates that the tumor has invaded into the outer part of the endometrium and the surrounding tissues, and timely treatment is needed to curb the progression of the disease, so please do not be negligent or discouraged, and actively cooperate with the treatment so as to avoid delaying the condition. Please strictly follow the doctor’s prescription for medication, and do not use medication on your own.