Novartis presents updated data that reinforce the efficacy and safety of Kisqali® (ribociclib) plus letrozole as a first-line option for HR+/HER2- advanced or metastatic breast cancer
  • At a subsequent analysis of the MONALEESA-2 trial, after nearly one year of additional follow-up, Kisqali plus letrozole demonstrated median progression-free survival (PFS) of 25.3 months compared to 16.0 months for letrozole alone[1]

  • Patients on Kisqali plus letrozole maintained overall health-related quality of life compared to those treated with letrozole alone, and no new safety concerns have been identified[2]

  • Novartis continues to evaluate Kisqali in multiple trials, in combination with different hormonal therapies, across a broad range of patients

Basel, June 2, 2017 - Novartis announced today updated findings from the Phase III MONALEESA-2 study that reinforce the efficacy and safety of Kisqali® (ribociclib) plus letrozole in postmenopausal women with hormone receptor positive, human epidermal growth factor receptor-2 negative (HR+/HER2-) advanced or metastatic breast cancer. After an additional 11 months of follow-up, a median progression-free survival (PFS) of 25.3 months (95% CI: 23.0-30.3) for Kisqali plus letrozole and 16.0 months (95% CI: 13.4-18.2) for letrozole alone was observed (HR=0.568 (95% CI: 0.457-0.704; prd Annual Meeting of the American Society of Clinical Oncology (ASCO) in Chicago (Abstract #1038).

These updated results further support that Kisqali plus letrozole improves PFS as a first-line treatment across all patient subgroups[1]. After two years of treatment, the progression-free survival rate was 54.7% in the Kisqali plus letrozole arm compared to 35.9% in patients treated with letrozole alone[1]. In a cohort of 213 US patients treated as part of MONALEESA-2, the median PFS was 27.6 months with Kisqali plus letrozole and 15.0 months with letrozole alone (HR=0.527 (95% CI: 0.351-0.793))[1].

Treatment benefit remained consistent across all patient subgroups regardless of demographics or disease characteristics, including women with visceral disease and those diagnosed de novo[1]. In women with measurable disease at baseline, 55% saw their tumor size shrink by at least 30% (overall response rate (ORR)) compared to 39% with letrozole plus placebo[1]. Follow-up to measure overall survival is ongoing as data remain immature[1].

"This new look at the MONALEESA-2 data, after an additional year of follow-up, demonstrates the continued efficacy of ribociclib plus letrozole," said Gabriel N. Hortobagyi, MD, Professor of Medicine, Department of Breast Medical Oncology, Division of Cancer Medicine, The University of Texas MD Anderson Cancer Center and MONALEESA-2 Principal Investigator. "With more than two years of follow-up, the PFS data confirm the inclusion of ribociclib plus an aromatase inhibitor as a strong option among first-line treatments for HR-positive, HER2-negative advanced breast cancer."