Thymectomy is a clinical procedure for diseases such as thymoma. There is no such thing as a thymectomy if the thymus gland has not existed since birth. Instead, patients with thymoma have their thymus removed because the thymus gland is not removed after birth, but continues to grow and develops into a tumor, which has an effect on the body. The thymus itself is the place where T-cells mature, and the production of thymoma enhances the cellular immune function and produces more clinical symptoms, such as increased infection stress and increased cytokines. Therefore, after thymectomy, the cellular immune function will return to normal and the immune function will be balanced. At this time, thymectomy is a good means to treat the disease, for normal people do not need to do thymectomy, so there is basically no effect on the body.