Clinical staging is not reliable
Depierre JCO 2002
pN0 pN1 pN2 pN3 Total
cN0
47
18 16 1 82
cN1 10
16
12 0 38
cN2 10 12
28
0 50
Total
67 46 56 1 170
Correctly classified = 91/170 = 54%