Table 3 Incidence of lymph node metastasis at each station according to the tumor location

#1

3.2% (11/347)

3.0% (3/101)

1.4% (1/70)

6.5% (2/31)

3.4% (5/145)

#2

1.3% (4/310)

0% (0/93)

1.6% (1/64)

3.7% (1/27)

1.6% (2/126)

#3

3.7% (12/326)

3.2% (3/94)

2.9% (2/68)

3.3% (1/30)

4.5% (6/134)

#4sa

0% (0/298)

0% (0/84)

0% (0/61)

0% (0/24)

0% (0/129)

#4sb

0.3% (1/329)

0% (0/95)

0% (0/67)

0% (0/28)

0.7% (1/139)

#4d

0.7% (2/287)

0% (0/83)

0% (0/56)

3.6% (1/28)

0.8% (1/120)

#5

0% (0/269)

0% (0/82)

0% (0/47)

0% (0/28)

0% (0/112)

#6

0.4% (1/273)

0% (0/81)

0% (0/49)

0% (0/30)

0.9% (1/113)

#7

3.2% (11/340)

3.0% (3/101)

4.5% (3/67)

6.9% (2/29)

2.1% (3/143)

#8a

1.2% (4/340)

2.0% (2/99)

0% (0/69)

3.4% (1/29)

0.7% (1/143)

#9

0.6% (2/325)

1.0% (1/96)

0% (0/69)

0% (0/25)

0.7% (1/135)

#10

0% (0/92)

0% (0/33)

0% (0/15)

0% (0/12)

0% (0/32)

#11p

1.3% (4/300)

2.2% (2/91)

0% (0/62)

0% (0/24)

1.6% (2/123)

#11d

0.5% (1/184)

1.7% (1/60)

0% (0/33)

0% (0/11)

0% (0/80)

#12a

0.5% (1/189)

0% (0/57)

0% (0/38)

0% (0/18)

1.3% (1/76)