本研究的目的是在激素受體陽性/人表皮生長因子受體-2陰性（ HR +/HER2- ）不可切除的局部晚期或轉移性乳癌參與者中，比較sacituzumab tirumotecan作為單一藥物，以及與pembrolizumab聯合治療的醫師選擇（ TPC ）。 主要假設是Sacituzumab tirumotecan作為單一藥物和Sacituzumab tirumotecan加上pembrolizumab a
適應症：Breast Neoplasms
收案條件
納入條件
- Has unresectable locally advanced or metastatic centrally-confirmed hormone receptor positive (HR+)/human epidermal growth factor receptor 2 negative (HER2-) breast cancer
- Has radiographic disease progression on one or more lines of endocrine therapy for unresectable locally advanced/metastatic HR+/HER2- breast cancer, with one in combination with a CDK4/6 inhibitor
- Is a chemotherapy candidate
- Has an eastern cooperative oncology group (ECOG) performance status of 0 to 1 assessed within 7 days before randomization
- Has adequate organ function
- Human immunodeficiency virus (HIV)-infected participants must have well controlled HIV on antiretroviral therapy
- Participants who are Hepatitis B surface antigen (HBsAg) positive are eligible if they have received HBV antiviral therapy for at least 4 weeks, and have undetectable HBV viral load
- Participants with a history of Hepatitis C virus (HCV) infection are eligible if HCV viral load is undetectable
排除條件
- Has breast cancer amenable to treatment with curative intent
- Has experienced an early recurrence (\<6 months after completing adjuvant/neoadjuvant chemotherapy) and therefore is eligible to receive second-line (2L) treatment
- Has symptomatic advanced/metastatic visceral spread at risk of rapidly evolving into life-threatening complications
- Has received prior chemotherapy for unresectable locally advanced or metastatic breast cancer
- Active autoimmune disease that has required systemic treatment in the past 2 years
- History of (noninfectious) pneumonitis/interstitial lung disease that requires steroids, or has current pneumonitis/interstitial lung disease
- Has an active infection requiring systemic therapy
收案條件維持 ClinicalTrials.gov 原始英文登錄資料，實際收案資格以研究團隊的正式評估與受試者同意書為準。資料來源：ClinicalTrials.gov，每兩週自動更新，最後同步：2026年10月8日。