45. Staging Stages Pathology Duke’s TNM Numerical ------ TisNoMo 0 Ca in situ A T1NoMo I Limited to mucosa/submucosa B1 T2NoMo I Into muscularis mucosae B2 T3NoMo II Into serosa C TxN1Mo III Involve regional lymph nodes D TxNxM1 IV Distant mets(liver and lungs)