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Attend this session at the
2018 ASCO Annual Meeting!


Session: Breast Cancer—Local/Regional/Adjuvant

Type: Oral Abstract Session

Time: Monday June 4, 8:00 AM to 11:00 AM

Location: Hall D2

Adjuvant denosumab in early breast cancer: First results from the international multicenter randomized phase III placebo controlled D-CARE study.

Sub-category:
Adjuvant Therapy

Category:
Breast Cancer—Local/Regional/Adjuvant

Meeting:
2018 ASCO Annual Meeting

Abstract No:
501

Citation:
J Clin Oncol 36, 2018 (suppl; abstr 501)

Author(s): Robert E. Coleman, Dianne Finkelstein, Carlos H. Barrios, Miguel Martin, Hiroji Iwata, John A. Glaspy, Ying Zhou, Danielle Jandial, Arlene Chan; University of Sheffield, Weston Park Hospital, Sheffield, United Kingdom; Massachusettts General Hospital/Harvard Medical School, Boston, MA; Latin American Cooperative Oncology Group, Porto Alegre, Brazil; Hospital General Universitario Gregorio Maranon, Madrid, Spain; Aichi Cancer Center Hospital, Nagoya, Japan; University of California Los Angeles Jonsson Comprehensive Cancer Center, Los Angeles, CA; Amgen, Inc., Thousand Oaks, CA; Amgen Inc., Thousand Oaks, CA; Breast Cancer Research Centre - WA & Curtin University, Perth, Australia

Abstract Disclosures

Abstract:

Background: Denosumab (Dmab) is a potent RANK ligand inhibitor approved for the management of treatment induced bone loss in early breast (EBC) and prevention of skeletal morbidity associated with metastatic bone disease. Preclinical data suggested that Dmab could prevent development of bone metastases. This trial evaluated the addition of Dmab to standard (neo)adjuvant therapy for high-risk EBC patients (pts). Methods: 4509 pts with EBC (93.5% node+) from 407 centers were randomized to standard loco-regional and (neo)adjuvant therapy plus either Dmab 120mg sc or matching placebo (P) monthly x 6 then 3 monthly for up to 5 years. In addition to routine clinical follow-up, pts underwent annual CT and bone scan imaging to screen for recurrence. Primary endpoint was bone metastasis free survival (BMFS) defined as first bone metastatic event confirmed by central imaging review or death from any cause. Secondary endpoints included disease free survival (DFS), DFS in the postmenopausal (PM) subgroup, overall survival (OS) and safety. Results: Patient groups were balanced for baseline characteristics with median age 51y, 77% ER+, 20% Her2+ and use of anthracycline and/or taxane chemotherapy in 95.9%. No benefits for the addition of Dmab were seen at a time-driven analysis performed after a median follow-up of 67 months that allowed for the full 5 years of treatment in all pts. Hazard ratio (HR) for BMFS (597 events) was 0.97, 95%CI 0.82-1.14, p = 0.70 and 1.04, 95%CI 0.91-1.19, p = 0.57 for DFS (875 events). OS (412 events) was similar in both groups (HR = 1.03, 95%CI 0.85-1.25). Dmab did not improve BMFS, DFS or OS in the PM subset (n = 2149). Exploratory analysis of time to bone metastases as first recurrence suggested benefit for Dmab (HR = 0.76, 95%CI 0.59-0.97) for this endpoint. Time to on-study fracture prior to bone recurrence was reduced with Dmab (HR = 0.76, 95%CI 0.63-0.92). 122 (5.4%) pts on Dmab and 4 (0.2%) on P developed osteonecrosis of the jaw. 9 (0.4%) pts on Dmab experienced an atypical femoral fracture. Conclusions: Adjuvant Dmab does not reduce breast cancer recurrences or deaths in EBC pts receiving optimal loco-regional and standard of care systemic adjuvant therapy. Clinical trial information: NCT01077154

 
Other Abstracts in this Sub-Category:

 

1. TAILORx: Phase III trial of chemoendocrine therapy versus endocrine therapy alone in hormone receptor-positive, HER2-negative, node-negative breast cancer and an intermediate prognosis 21-gene recurrence score.

Meeting: 2018 ASCO Annual Meeting Abstract No: LBA1 First Author: Joseph A. Sparano
Category: Breast Cancer—Local/Regional/Adjuvant - Adjuvant Therapy

 

2. Adjuvant denosumab in early breast cancer: Disease-free survival analysis of 3,425 postmenopausal patients in the ABCSG-18 trial.

Meeting: 2018 ASCO Annual Meeting Abstract No: 500 First Author: Michael Gnant
Category: Breast Cancer—Local/Regional/Adjuvant - Adjuvant Therapy

 

3. Role of adding ovarian function suppression to tamoxifen in young women with hormone-sensitive breast cancer who remain premenopausal or resume menstruation after chemotherapy: The ASTRRA study.

Meeting: 2018 ASCO Annual Meeting Abstract No: 502 First Author: Woo Chul Noh
Category: Breast Cancer—Local/Regional/Adjuvant - Adjuvant Therapy

 

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