Case List History Objectives Radiology Images Questions COLORECTAL DISEASE Case #1 - A 50 year old with positive stool guaiac DISCUSSION QUESTIONS: 8.) What is the TNM staging of colon cancer? Primary tumor = T T1     Tumor invades submucosa T2     Tumor invades muscularis propria T3     Tumor invades subserosa or into nonperitonealized pericolic or perirectal tissue T4     Tumor perforates visceral peritoneum or invades other organs Regional lymph nodes = N N0     No regional node metastasis N1     Metastasis in 1-3 pericolic nodes N2     Metastasis in 4 or more pericolic nodes N3     Metastasis in nodes along named trunks Distant metastasis = M M0      No distant metastasis M1     Distant metastasis present Staging group: Modified Astler-Coller (Dukes') Stage I T1 N0 A T2 N0 M0 B1 Stage II T3 N0 M0 B2 T4 N0 M0 B3 Stage III Any T N1 M0 C1 Any T N2, N3 M0 C2 Stage IV Any T Any N M1 D
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