Real-World Data of Palbociclib in Combination With Endocrine Therapy for the Treatment of Metastatic Breast Cancer in Men

Albert L. Kraus*, Michelle Yu-Kite, Jack Mardekian, Matthew J. Cotter, Sindy Kim, Jaclyn Decembrino, Tamara Snow, Kenneth R. Carson, Jillian Motyl Rockland, Anala Gossai, Keith Wilner, Diane D. Wang, Cynthia Huang Bartlett, Norihiko Oharu, Patrick Schnell, Todd VanArsdale, Dongrui R. Lu, Jennifer M. Tursi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


This report examined the benefits and risks of palbociclib plus endocrine therapy (ET) in men with hormone receptor‒positive (HR+)/human epidermal growth factor receptor 2−negative (HER2−) metastatic breast cancer (MBC). Palbociclib was evaluated using three independent data sources: real-world data from pharmacy and medical claims, a de-identified real-world data source derived from electronic health records (EHRs), and a global safety database. From medical and pharmacy records, 1,139 men with MBC were identified; in the first-line setting, median duration of treatment was longer with palbociclib plus ET (n = 37, 8.5 months, 95% confidence interval (CI), 4.4‒13.0) than ET alone (n = 214, 4.3 months, 95% CI, 3.0‒5.7) and specifically, was longer with palbociclib plus letrozole (n = 26, 9.4 months, 95% CI, 4.4‒14.0) than letrozole alone (n = 63, 3.0 months, 95% CI, 1.8‒4.8). In the EHR-derived database, 59 men received treatment for MBC; real-world response across all lines of therapy in the metastatic setting was reported in 4 of 12 patients (33.3%) in the palbociclib plus ET group vs. 1 of 8 (12.5%) patients in the ET group. Review of the global safety database did not identify any new safety signals in palbociclib-treated men. Real-world data indicated that men with MBC benefit from palbociclib plus ET, with a safety profile consistent with previous observations in women with MBC. Collective data on palbociclib in women and men in this report, including clinical trial data, real-world data, and a well-established risk/benefit profile, led to US approval of an expansion of the palbociclib indication to include men with MBC.

Original languageEnglish (US)
Pages (from-to)302-309
Number of pages8
JournalClinical pharmacology and therapeutics
Issue number1
StatePublished - Jan 2022

ASJC Scopus subject areas

  • Pharmacology
  • Pharmacology (medical)


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