At ASCO 2026, investigators presented the pre-specified menopausal subgroup analysis from the lidERA BC trial. Compared with standard endocrine therapy, the oral selective estrogen receptor degrader (SERD) giredestrant reduced the risk of distant recurrence by 42% in premenopausal women with HR+/HER2− early breast cancer (HR=0.58), while also reducing the risk by 24% in postmenopausal patients (HR=0.76). These findings offer renewed optimism for adjuvant endocrine therapy, an area that has seen few major advances over the past decade.

At the 2026 American Society of Clinical Oncology (ASCO) Annual Meeting, Zhenzhen Liu and colleagues from Henan Cancer Hospital presented four studies from the HELEN clinical research program (Abstracts #1009, #509, #1054, and #609), spanning key breast cancer subtypes including triple-negative breast cancer (TNBC), HER2-positive disease, and HR+/HER2+ breast cancer.

Triple-negative breast cancer (TNBC) is an aggressive disease with a poor prognosis, making it essential to improve the efficacy of neoadjuvant therapy while minimizing treatment-related toxicity. At the 2026 American Society of Clinical Oncology (ASCO) Annual Meeting, Xiaowei Qi and colleagues from Southwest Hospital, Army Medical University presented the latest results from the NeoTAPPL study (Abstract #600).

At the 2026 American Society of Clinical Oncology (ASCO) Annual Meeting, held from May 29 to June 2 in Chicago, USA, results from the IRIS-A study (Abstract #508) were presented during the Rapid Oral Abstract Session on Local, Regional, and Adjuvant Breast Cancer.

At the 2026 American Society of Clinical Oncology (ASCO) Annual Meeting, Jiong Wu from Fudan University Shanghai Cancer Center presented the highly anticipated PANKU-Breast02 study (Abstract LBA1003).

At the 2026 American Society of Clinical Oncology (ASCO) Annual Meeting, a study led by Professor Hui Xie from Jiangsu Cancer Hospital was presented as an electronic poster (Abstract e13078). Using multicenter real-world data from China, the study is the first to systematically evaluate the relationship between body mass index (BMI) and the efficacy and safety of trastuzumab deruxtecan (T-DXd) in patients with HER2-positive or HER2-low advanced breast cancer.

The 2026 American Society of Clinical Oncology (ASCO) Annual Meeting, held from May 29 to June 2 in Chicago, USA, featured the first-in-human Phase 1a results (Abstract #3013) of BG-C9074, a novel B7-H4-targeting antibody-drug conjugate (ADC) developed in China, during the Rapid Oral Abstract Session on Developmental Therapeutics.

For patients with HR+/HER2− advanced breast cancer, fulvestrant combined with targeted therapy remains the preferred treatment after progression on aromatase inhibitors (AIs). However, for patients whose disease progresses following fulvestrant, there is currently no established standard of care worldwide.