Stage	Sites of Primary Tumor	Tumor Size	Regional Lymph Nodes	Distant Metastases
1	Favorable sites	Any size	N0 , or N1, or NX	M0
2	Unfavorable sites	T1a or T2a	N0 or NX	M0
3	Unfavorable sites	T1a, T2a, or	N1	M0
		T1b, T2b	N0 or N1 or NX
4	Any site	Any size	N0 or N1	M1