Table 1.

Patient tumor staging

N0–N1 group					N2–N3/T4 group
No. 1	No. 2	No. 3	No. 4	No. 5	No. 6	No. 7	No. 8	No. 9	No. 10
T2 N0	T3 N0	T3 N0	T2 N1	T3 N1	T4 N2	T1 N2	T4 N1	T3 N2	T4 N2