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Copyright ©2014 Baishideng Publishing Group Inc.
World J Clin Cases. Nov 16, 2014; 2(11): 654-660
Published online Nov 16, 2014. doi: 10.12998/wjcc.v2.i11.654
Table 3 TNM staging system for squamous cell carcinoma
StagePrimary tumourRegional lymph nodesDistant metastasis
Stage 0Tis = carcinoma in situN0 = no regional lymph node involvementM0
Stage IT1 = tumour 2 cm or lessN0M0
Stage IIT2 = tumour > 2 cm but < 5 cmN0M0
T3 = tumour > 5 cmN0M0
Stage IIIT4 = Invasion of deeper extradermal structuresN0M0
Any TN1 = regional lymph node spread.M0
Stage IVAny TAny NM1 = distant metastasis.