胸腺瘤预后与TNM分类

Answer: c. TNM classification of the tumor

Thymoma is a rare tumor of thymic epithelial origin that occurs in a wide age range. Thymomas can be divided into several histological subtypes depending on the shape of cells and proportion of epithelial cells to mixed lymphocytic infiltrates, including types A, AB, B1, B2, and B3. Thymomas are considered malignant neoplasms in spite of variable histology and clinical course. The prognosis of thymoma is closely related to the extent of invasion and metastasis, which are the main parameters used for the TNM staging of this tumor.

Guo Ruifeng; Erickson Lori A.Mayo Clinic proceedings.2019.DOI:10.1016/j.mayocp.2019.04.003