A 50-year-old postmenopausal woman undergoes surgery for a 2.5 cm ER-positive, HER2-negative, node-negative breast cancer. According to the TNM 8th edition staging system, what is the anatomic stage grouping for T2N0M0?
- A Stage I
- B Stage IIB
- C Stage IIA ✓
- D Stage IIIA
Correct answer: C. Stage IIA
Explanation
In the AJCC 8th edition TNM staging for breast cancer, T2N0M0 (tumor >2 cm but ≤5 cm, no nodal metastasis, no distant metastasis) corresponds to Stage IIA. Stage I is T1N0M0. Stage IIB is T2N1M0 or T3N0M0. Stage IIIA includes T0-2N2M0 or T3N1-2M0.
Reference: AJCC Cancer Staging Manual, 8th ed.
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