Table 1.

Shows classification of TNM staging system used for cancer diagnosis.

Staging	TNM classification
0	Tis, N0, M0
IA	T1, N0, M0
IB	T1, N1, M0 T2, N1, M0
IIA	T1, N2, M0 T2, N1, M0
IIB	T1, N3a, M0 T2, N2, M0 T3, N1, M0 T4a, N0, M0
IIIA	T2, N3a, M0 T3, N2, M0 T4a, N1, M0 T4b, N0, M0
IIIB	T1 or T2, N3b, M0 T3, N3a, M0 T4a, N3a, M0 T4b, N1 or N2, M0
IIIC	T3 or T4a, N3b, M0 T4b, N3a or N3b, M0
IV	Any T, Any N, M1