The system is based on the spread of the primary tumor (t), the extent of lymph node involvement (n), and the presence or absence of metastases (m).
系统包括三个部分：原发肿瘤的扩散程度(t)；淋巴结的转移程度(N)和是否有了其他器官的转移(M)。
2
Steele, K. M. , T. N. Ball, and R. Runk, " Listening to Mozart does not enhance backwards digit span performance. " Percept Mot Skills, 1997. 84 (3 Pt 2): p. 1179-84.