Thymic carcinoma is mainly divided into four stages, and stage II thymic carcinoma is more serious. Stage II thymic carcinoma mainly manifests as tumor invasion of mediastinal tissue or mediastinal pleura or extracellular invasion under the microscope. If not treated in time, it will easily develop into stage III or IV, with tumor invasion of neighboring tissues (pericardium, blood vessels or lungs, etc.) and spreading of the tumor to thoracic and abdominal membranes, which will result in irreparable consequences, therefore, stage II thymic carcinoma is more serious. The main treatment mode that should be taken in time when thymic carcinoma is in stage II is surgery, and according to the extent of tumor invasion, it will be decided whether to carry out radiotherapy or chemotherapy after surgery. Thymic cancer is a kind of tumor that progresses faster and is more serious, so one should go to the hospital immediately for consultation, and after diagnosis, actively carry out treatment according to the doctor’s instruction, adjust the mentality and set up the confidence of overcoming the disease, so as to avoid the deterioration of the condition.