Stage I Thymoma AJCC v8

**Semantic type:** Neoplastic Process

**Definition:** Stage I includes: T1a, b, N0, M0. T1a: Tumor with no mediastinal pleura involvement. T1b: Tumor with direct invasion of mediastinal pleura. N0: No regional lymph node metastasis. M0: No distant metastasis. (AJCC 8th ed.)

**Synonyms:** - Stage I Thymoma