Table 2. TNM Staging.

Tumor	Lymph node	Metastasis	Grade	ER	PR	Stage
T1	N0	M0	1	Positive	Positive	IA
T1	N0	M0	1	Positive	Negative	IB
T1	N0	M0	1	Negative	Negative	IIA
T1	N0	M0	2	Positive	Positive	IIA
T1	N0	M0	2	Positive	Negative	IIB
T1	N0	M0	2	Negative	Negative	IIIA
T2	N0	M0	1	Positive	Positive	IIA
T2	N0	M0	1	Positive	Negative	IIB
T2	N0	M0	1	Negative	Negative	IIIA
T2	N0	M0	2	Positive	Positive	IIIA
T2	N0	M0	2	Positive	Negative	IIIB
T2	N0	M0	2	Negative	Negative	IIIC
T3	N0	M0	1	Positive	Positive	IIIA
T3	N0	M0	1	Positive	Negative	IIIB
T3	N0	M0	1	Negative	Negative	IIIC
T4	N0	M0	1	Any	Any	IIIC
T1	N1	M0	1	Any	Any	IIB
T1	N1	M0	2	Any	Any	IIIA
T2	N1	M0	1	Any	Any	IIIA
T2	N1	M0	2	Any	Any	IIIB
T3	N1	M0	1	Any	Any	IIIB
T3	N1	M0	2	Any	Any	IIIC
Any T	N2	M0	Any	Any	Any	IIIC
Any T	N3	M0	Any	Any	Any	IV
Any T	Any N	M1	Any	Any	Any	IV

Grade: tumor grade (1 = low, 2 = intermediate, 3 = high). ER: estrogen receptor; PR: progesterone receptor; TNM stage: tumor, node, metastasis stage.