TNM 8THAJCC Colorectal Staging Framework
Pathologic Classification
Staging Components
- T: Depth of invasion into lamina propria, submucosa, muscularis propria, or serosa.
- N: Number of regional lymph nodes (N1: 1-3, N2: 4+) or tumor deposits (N1c).
- M: Distant metastasis to one (M1a) or multiple (M1b) organs, or peritoneum (M1c).
Guidelines & Evidence
Verified
Last Review: 2026
Last Comprehensive Review: 2026
