A 52-year-old woman undergoes breast conservation surgery for a 2.1 cm ER+/PR+/HER2- grade 2 invasive ductal carcinoma with sentinel node biopsy showing 1 out of 3 nodes positive (micro-metastasis, 0.8 mm). According to the ACOSOG Z0011 trial criteria, the most appropriate next step regarding axillary management is:
- A Completion axillary lymph node dissection
- B Axillary radiation boost only
- C No further axillary surgery; proceed with whole breast radiation ✓
- D Axillary lymph node dissection followed by radiation
Correct answer: C. No further axillary surgery; proceed with whole breast radiation
Explanation
The ACOSOG Z0011 trial demonstrated that in clinically node-negative patients undergoing breast conservation surgery with 1-2 positive sentinel nodes who receive whole breast radiation and systemic therapy, completion axillary lymph node dissection provides no survival benefit. The patient meets these criteria (BCS, whole breast radiation planned, systemic therapy given). Micro-metastases (0.2-2 mm) count toward the 1-2 node criterion. Completion ALND is no longer standard in this scenario.
Reference: Bailey & Love's Short Practice of Surgery, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.