Stage IIIB Thymoma AJCC v9

**Semantic type:** Neoplastic Process

**Definition:** Stage IIIB includes: T4, N0, M0. T4: Tumor with direct invasion into any of the following: aorta (ascending, arch, or descending), arch vessels, intrapericardial pulmonary artery or veins, myocardium, trachea, esophagus. N0: No involvement of regional lymph node(s). M0: No distant metastasis. (AJCC 9th ed.)