What is TNM Staging?
TNM staging combines Tumor size (T), Lymph Node involvement (N), and Metastasis status (M) to determine the overall stage of breast cancer. Use the sections below to explore each component and calculate your stage.
AJCC 2018 Stage Groups Summary
Clinical Notes
- AJCC 2018 Updates: The 8th edition includes both anatomic and prognostic staging systems
- Prognostic Staging: Incorporates tumor grade, ER/PR status, HER2 status, and gene expression profiles
- Anatomic Staging: Based solely on TNM criteria as shown in this tool
- Clinical Application: Both systems should be used together for comprehensive patient assessment
- Treatment Planning: Stage guides treatment decisions including surgery, chemotherapy, radiation, and targeted therapy
- Biomarkers Matter: Hormone receptor status and HER2 significantly impact prognosis and treatment selection