Yeon Hee Park, MD, PhD, on Metastatic Breast Cancer: Updated Survival Results of the Young-PEARL Study
2024 ASCO Annual Meeting
Yeon Hee Park, MD, PhD, of South Korea’s Samsung Medical Center and Sungkyunkwan University, discusses phase II findings on palbociclib plus exemestane with a GnRH agonist vs capecitabine in premenopausal patients with hormone receptor–positive, HER2-negative metastatic breast cancer (LBA1002).
Transcript
Disclaimer: This video transcript has not been proofread or edited and may contain errors.
YoungPEARL study is a prospective randomized phase 2 study to compare palbociclib plus exemestane plus GnRH agonist versus capecitabine for premenopausal HR-positive HER2-negative metastatic breast cancers. Actually, this clinical trial was published and presented in 2019. According to that trial research, palbociclib plus exemestane plus GnRH antagonist showed a superior PFS compared to the capecitabine. Their median PFS was 20.1 months versus capecitabine, 14.4 months. This kind of real big research contributed to expansion of palbociclib plus AI label to include premenopausal population.
So now, here we reported updated overall survival research. Data cutoff is February 29th, 2024 with median follow-up duration of 54 months. So we follow up the updated PFS research to show the consistent superior PFS showed in palbociclib arm. Median PFS was 19.5 months versus 14 months of PFS shown in capecitabine arm. Hazard ratio in people was strongly enough to consider it's a big impact in terms of PFS.
And now, we show the overall survival research. There is no big difference between the two arm. Palbociclib arm showed the 54.7 months of PFS, and then capecitabine arm showed a remarkable PFS of 57.8 months. They did not show any difference, but it's 54 months of longer follow-up duration. Palbociclib arm showed a pretty consistent, longer overall survival of 54.8 months. So it's a really... Extended overall survival was shown in palbociclib arm. But palbociclib superior PFS did not lead to the overall survival benefit compare capecitabine arm. But capecitabine arm showed... Multivariate analysis showed the post-treatment CDK4/6 inhibitor was identified as a independent favorable factor for overall survival with statistical significance. So maybe post CDK inhibitor treatment contributed to extended overall survival in palbociclib arm.
The ASCO Post Staff
Thomas Powles, MD, PhD, of Barts Cancer Institute and the University of London, and Jonathan E. Rosenberg, MD, of Memorial Sloan Kettering Cancer Center, discuss clinical outcomes of sacituzumab govitecan-hziy after prior exposure to enfortumab vedotin-ejfv in patients with metastatic urothelial carcinoma, as well as the safety and efficacy of fam-trastuzumab deruxtecan-nxki in patients with HER2-expressing bladder tumors (Abstracts 4502 and 4509).
The ASCO Post Staff
Mazyar Shadman, MD, MPH, of Fred Hutchinson Cancer Center, discusses a network meta-analysis showing that zanubrutinib appears to be the most efficacious Bruton’s tyrosine kinase (BTK) inhibitor for patients with high-risk relapsed or refractory chronic lymphocytic leukemia. It offers delayed disease progression and favorable survival and response, compared with alternative BTK inhibitors (Abstract 7048).
The ASCO Post Staff
Peter Riedell, MD, of The University of Chicago, discusses phase III findings on the regimen of brentuximab vedotin in combination with lenalidomide and rituximab for patients with relapsed or refractory diffuse large B-cell lymphoma (DLBCL). This therapy demonstrated a survival advantage in the third-line setting, but as this is an interim analysis, questions remain regarding long-term safety and duration of response, according to Dr. Riedell (Abstract LBA7005).
The ASCO Post Staff
Claudio Cerchione, MD, PhD, of Italy’s Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori, discusses preliminary findings from a prospective trial suggesting that by adding whole-body MRI to fludeoxyglucose-18 (FDG) PET/CT scans, clinicians may detect bone lesions earlier and more accurately in patients with either newly diagnosed or relapsed multiple myeloma, thus translating into potentially better outcomes (Abstract 7512).
The ASCO Post Staff
Milana Bergamino Sirvén, MD, PhD, of Spain’s Institute of Cancer Research, discusses her findings on molecular profiling of patients with estrogen receptor–positive, HER2-positive early-stage breast tumors after short-term preoperative endocrine therapy. This study suggests that such profiling may help clinicians identify those patients with a favorable prognosis for adjuvant endocrine therapy and those who may require additional treatment (Abstract 560).