Harry D Bear1, Wen Wan1, André Robidoux2, Peter Rubin3, Steven Limentani4, Richard L White4, James Granfortuna3, Judith O Hopkins5, Dwight Oldham6, Angel Rodriguez7, Amy P Sing8. 1. Virginia Commonwealth University and Massey Cancer Center, Richmond, Virginia. 2. Centre Hospitalier de l'Universite de Montreal, Montreal, Quebec, Canada. 3. Cone Health Cancer Center, Greensboro, North Carolina. 4. Carolinas Medical Center, Charlotte, North Carolina. 5. Forsyth Regional Cancer Center, Winston Salem, North Carolina. 6. Lynchburg Hematology Oncology Clinic, Lynchburg, Virginia. 7. Methodist Hospital, Houston, Texas. 8. Genomic Health, Inc., Redwood City, California.
Abstract
OBJECTIVE: We hypothesized that the Oncotype Dx® 21-gene Recurrence Score (RS) could guide neoadjuvant systemic therapy (NST) to facilitate breast conserving surgery (BCS) for hormone receptor positive (HR+) breast cancers. METHODS: This study enrolled patients with HR+, HER2-negative, invasive breast cancers not suitable for BCS (size ≥ 2 cm). Core needle biopsy blocks were tested. For tumors with RS < 11, patients received hormonal therapy (NHT); patients with RS > 25 tumors received chemotherapy (NCT); patients with RS 11-25 were randomized to NHT or NCT. Primary endpoint was whether 1/3 or more of randomized patients refused assigned treatment. RESULTS:Sixty-four patients were enrolled. Of 33 patients with RS 11-25, 5 (15%) refused assignment to NCT. This was significantly lower than the 33% target (binomial test, P = 0.0292). Results for clinical outcomes (according to treatment received for 55 subjects) included successful BCS for 75% of tumors with RS < 11 receiving NHT, 72% for RS 11-25 receiving NHT, 64% for RS 11-25 receiving NCT, and 57% for RS > 25 receiving NCT. CONCLUSIONS: Using the RS to guide NST is feasible. These results suggest that for patients with RS < 25 NHT is a potentially effective strategy.
RCT Entities:
OBJECTIVE: We hypothesized that the Oncotype Dx® 21-gene Recurrence Score (RS) could guide neoadjuvant systemic therapy (NST) to facilitate breast conserving surgery (BCS) for hormone receptor positive (HR+) breast cancers. METHODS: This study enrolled patients with HR+, HER2-negative, invasive breast cancers not suitable for BCS (size ≥ 2 cm). Core needle biopsy blocks were tested. For tumors with RS < 11, patients received hormonal therapy (NHT); patients with RS > 25 tumors received chemotherapy (NCT); patients with RS 11-25 were randomized to NHT or NCT. Primary endpoint was whether 1/3 or more of randomized patients refused assigned treatment. RESULTS: Sixty-four patients were enrolled. Of 33 patients with RS 11-25, 5 (15%) refused assignment to NCT. This was significantly lower than the 33% target (binomial test, P = 0.0292). Results for clinical outcomes (according to treatment received for 55 subjects) included successful BCS for 75% of tumors with RS < 11 receiving NHT, 72% for RS 11-25 receiving NHT, 64% for RS 11-25 receiving NCT, and 57% for RS > 25 receiving NCT. CONCLUSIONS: Using the RS to guide NST is feasible. These results suggest that for patients with RS < 25 NHT is a potentially effective strategy.
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