A 45-year-old woman undergoes sentinel lymph node biopsy for a 1.8 cm invasive breast cancer. Two sentinel nodes are retrieved; one contains a 0.4 mm micrometastasis and the other is negative. The Z0011 trial criteria are met. What is the standard recommendation?
- A Proceed to axillary lymph node dissection to clear remaining nodal disease
- B No further axillary surgery; complete treatment with whole-breast irradiation and systemic therapy ✓
- C Repeat sentinel node biopsy with blue dye only
- D Axillary irradiation alone as a replacement for sentinel node biopsy re-excision
Explanation
The ACOSOG Z0011 trial demonstrated that women with clinically T1–T2 breast cancer, 1–2 positive sentinel nodes, who undergo breast-conserving surgery and whole-breast irradiation do NOT benefit from completion axillary lymph node dissection in terms of locoregional recurrence or survival. A 0.4 mm focus is technically a micrometastasis but even limited sentinel node positivity within Z0011 criteria does not require ALND. Option A would lead to unnecessary morbidity (lymphedema, shoulder dysfunction). Options C and D are not standard responses to a positive sentinel node.
Reference: Bailey & Love's Short Practice of Surgery, 27th ed.
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Written and medically reviewed by the StethoPrep medical team.