After surgery for thymoma type b2, half of the people don’t live more than 5 years, and half of the people live more than 5 years, even 10 years. Because thymoma type b2 is a cortical thymoma, this tumor is able to break through the envelope and grow, with infiltration of the surrounding tissue. How malignant it is is mainly determined by the extent and breadth of infiltration between the tumor and the surrounding area during surgery. If the extent of infiltration is small, the recurrence or metastasis after resection will be long, and its life span will be long, it will be able to live for 5 years, 10 years. If the disease is infiltrated with peripheral blood vessels, lungs or pleura, and the mass cannot be completely removed by surgery, postoperative radiotherapy or chemotherapy will be needed to improve the effect of surgery. But overall, it’s usually about 3 years later.