The degree of malignancy of thymic carcinoma is not low, because thymic carcinoma itself is a primary malignant thymic epithelial tumor with highly invasive characteristics. Thymic adenocarcinoma is an aggressive epithelial malignant tumor disease, and although it is relatively rare in clinic, patients with this disease are often prone to regional lymph node metastasis and extrathoracic metastasis. Moreover, local metastasis and extensive distant dissemination are easy to occur at the early stage of the disease, and the overall prognosis of the disease is relatively poor compared with that of ordinary thymoma, so the malignancy degree of thymic carcinoma is not low. Thymic carcinoma itself is a lethal malignant disease, and guidelines on thymic carcinoma suggest that the five-year productivity of the disease is about 55%. Therefore, it is important to strive for standardized diagnosis and treatment of thymic carcinoma at the early stage of the disease, so as to improve the prognosis of the disease and prolong the survival period. It is recommended that patients undergo standardized diagnosis and treatment under the guidance of professional doctors.