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What is Tumor invades muscularis propria and 2 lymph nodes involved. TNM staging is and explain in detail?
T1 Invades submucosaT2Invades muscularis propriaT3Invades through the muscularis propria into pericolrectal tissuesT4aInvades through the visceral peritoneumT4bDirectly invades to adjacent organs or structuresN1aOne node positiveN1b2-3 nodes positiveN1cNo regional lymph nodes positive, but there are tumour deposits in the subserosa, Mesentry or non peritonealized pericolic/ perirectal/ mesorectal tissues N2a4-6 lymph nodes positiveN2b7 or more lymph nodes positiveM1aMetastasis to one site or organ, without peritoneal metastasisM1bMetastasis to 2 or more sites or organs without peritoneal metastasisM1c Metastasis to the peritoneal surface (alone or along with other site/organ)Ref: AJCC 8e