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Cancer-specific survival (CSS) probability according to the 2009 TNM staging system (log rank pooled over strata p < 0.0001). Five-year CSS was 94.9% in pT1a (blue curve), 92.6% in pT1b (green curve), 85.4% in pT2a (gray curve), 70% in pT2b (violet curve), 64.7% in pT3a (yellow curve), 54.7 in pT3b (red curve), 17.9 in pT3c (light blue curve), and 27.1% in pT4 (light gray curve). All the pairwise survival differences among the different pT stages were statistically significant with the exception of those observed between pT2b and pT3a cancers (log-rank pairwise p = 0.34) and between pT3c and pT4 cancers (log-rank pairwise p = 0.26).
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