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Sentinel Lymph Node Biopsy Versus Axillary Clearance in Operable Breast Cancer: The RACS SNAC Trial, A Multicenter Randomized Trial of the Royal Australian College of Surgeons (RACS) Section of Breast Surgery, in Collaboration with the National Health and Medical Research Council Clinical Trials Center

From The RACS SNAC Trial, C/- Breast, Endocrine & Surgical Oncology Unit, Royal Adelaide Hospital, Adelaide SA, Australia.

Correspondence: Address correspondence and reprint requests to: P. Grantley Gill, MD, The RACS SNAC Trial, C/- Breast, Endocrine & Surgical Oncology Unit, Level 6, East Wing Link, Royal Adelaide Hospital, North Terrace, Adelaide SA 5000, Australia; Fax: 61-8-8222-5896; E-mail: grantley.gill{at}adelaide.edu.au

ABSTRACT

The aim of the SNAC trial is to determine if sentinel node biopsy (SNB) produces less morbidity and equivalent cancer-related outcomes in comparison with immediate axillary clearance (AC) in women with early breast cancer. The intervention is SNB followed by immediate AC, or SNB followed by AC only if the SNB specimen is positive. This is a multicenter, centrally randomized phase III trial of 1000 women stratified according to age, tumor palpability, lymphatic mapping technique, and center. Accrual rate is 26 women per month; 789 women have been randomized to date. Analysis of the first 150 women indicates good compliance with study treatment and acceptable surgical technique.

Key Words: Axillary clearance • Breast cancer • Sentinel node

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