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Study identifier: NCT04553770 Synced from ClinicalTrials.gov · July 28, 2026
● Recruiting

Trastuzumab Deruxtecan Alone or in Combination With Anastrozole for the Treatment of Early Stage HER2 Low, Hormone Receptor Positive Breast Cancer

Condition: Early-stage Breast Cancer · Hormone Receptor Positive Breast Carcinoma · Invasive Breast Cancer  ·  Sponsor: Jonsson Comprehensive Cancer Center

PhasePhase 2
Planned participants88
Who can joinAll sexes, 18 Years to no upper limit
Healthy volunteersNo

About this study

This phase II trial investigates how well trastuzumab deruxtecan works alone or in combination with anastrozole in treating patients with HER2 low, hormone receptor positive breast cancer. Trastuzumab deruxtecan is a monoclonal antibody, called trastuzumab, linked to a chemotherapy drug called deruxtecan. Trastuzumab attaches to HER2 expressed at low levels on cancer cells in a targeted way and delivers deruxtecan to kill them. Anastrozole works by decreasing estrogen production and suppressing the growth of tumors that need estrogen to grow. This study is evaluating how effective trastuzumab deruxtecan is at treating hormone receptor positive cancer cells that have low levels of HER2 expressed on them when given alone or in combination with anastrozole.

This description comes directly from the study's public registry record.

Talk to the study team

TRIO-US  ·  310-829-5471  ·  ISTTeam@mednet.ucla.edu

Always discuss trial participation with your own doctor first.

Locations (9)

St. Joseph Heritage HealthcareFullerton, California, United StatesRecruiting
Cancer Blood and Specialty ClinicLos Alamitos, California, United StatesRecruiting
UCLA / Jonsson Comprehensive Cancer CenterLos Angeles, California, United StatesRecruiting
Torrance Memorial Physician Network / Cancer CareTorrance, California, United StatesRecruiting
PIH HealthWhittier, California, United StatesRecruiting
Orlando Health, Inc. d/b/a Orlando Health UF Health CenterOrlando, Florida, United StatesWithdrawn
Ft. Wayne Medical Oncology and Hematology, Inc.Fort Wayne, Indiana, United StatesWithdrawn
Cancer Center of KansasWichita, Kansas, United StatesRecruiting
Massachusetts General HospitalBoston, Massachusetts, United StatesRecruiting

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Source record: clinicaltrials.gov/study/NCT04553770