Is sentinel node biopsy necessary in the radiologically negative axilla in breast cancer?

PURPOSE

The steady move towards axillary conservatism in breast cancer is based on studies demonstrating that axillary node clearance affords no survival benefit in a subset of patients with a positive pre-operative axillary ultrasound (AUS). However, less attention has been paid to AUS-negative patients who receive sentinel node biopsy as standard.

METHODS

Previously assembled systematic review data was reassessed to evaluate nodal burden amongst patients with breast cancer and a clinically and radiologically negative axilla.

RESULTS

Pooled data from four cohort studies reporting pre-operative axillary ultrasound in 5139 patients with breast cancer show it has a negative predictive rate of 0.951 (95% confidence interval 0.941-0.960).

CONCLUSIONS

Reconsidering the use of ultrasound in patients with early breast cancer and non-palpable axillae reveals that sentinel node biopsy itself may represent surgical over-treatment in patients with a negative axillary ultrasound. The implications of this on the future of surgical management of the axilla are discussed.