← Eichor
Study identifier: NCT06876714 Synced from ClinicalTrials.gov · July 28, 2026
● Recruiting

ShortStop-HER2: 12 Months vs. 6 Months of HER2-targeted Medications for People With HER2+ Breast Cancer Who Had a Pathologic Complete Response After Chemotherapy Plus Trastuzumab

Condition: Anatomic Stage I Breast Cancer AJCC v8 · Anatomic Stage II Breast Cancer AJCC v8 · Early Stage HER2+ Breast Cancer  ·  Sponsor: Alliance for Clinical Trials in Oncology

PhasePhase 3
Planned participants1524
Who can joinAll sexes, 18 Years to no upper limit
Healthy volunteersNo

About this study

This phase III trial compares 6 months of human epidermal growth factor receptor 2 (HER2)-targeted therapy to 12 months of HER2-targeted therapy for the treatment of HER2-positive (+) breast cancer in patients that had a pathologic complete response (pCR) after preoperative (neoadjuvant) chemotherapy with trastuzumab. Trastuzumab and pertuzumab are monoclonal antibodies and forms of targeted therapy that attach to a receptor protein called HER2. HER2 is found on some cancer cells. When trastuzumab or pertuzumab attach to HER2, the signals that tell the cells to grow are blocked and the tumor cell may be marked for destruction by the body's immune system. Giving 6 months of HER2-targeted therapy may work better than giving 12 months for the treatment of HER2+ breast cancer in patients that had a pCR after neoadjuvant chemotherapy with trastuzumab.

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

Talk to the study team

Jack Beranek  ·  773-702-9171  ·  breastprotocols@alliancenctn.org

Always discuss trial participation with your own doctor first.

Locations (671)

Cancer Center at Saint Joseph'sPhoenix, Arizona, United StatesSuspended
Mayo Clinic Hospital in ArizonaPhoenix, Arizona, United StatesRecruiting
Mercy Hospital Fort SmithFort Smith, Arkansas, United StatesSuspended
NEA Baptist Memorial Hospital and Fowler Family Cancer Center - JonesboroJonesboro, Arkansas, United StatesRecruiting
CARTI Cancer CenterLittle Rock, Arkansas, United StatesSuspended
Mission Hope Medical Oncology - Arroyo GrandeArroyo Grande, California, United StatesSuspended
Tower Cancer Research FoundationBeverly Hills, California, United StatesRecruiting
Mercy Cancer Center - CarmichaelCarmichael, California, United StatesRecruiting
Mercy San Juan Medical CenterCarmichael, California, United StatesRecruiting
Enloe Medical CenterChico, California, United StatesRecruiting
Kaiser Permanente DublinDublin, California, United StatesRecruiting
Mercy Cancer Center - Elk GroveElk Grove, California, United StatesRecruiting

+ 659 more locations — full list on the registry record.

Follow this study

Get one email when the public record changes — results posted, or the study's status changes. Nothing else, ever.

We email about this public record only. Unsubscribe anytime with one click. Never medical advice.

Is this your study? This page was generated automatically from the public registry record. Sponsors can claim it — free — to add branding and verified contact routing. Claim this page →

This page is independently generated by Eichor from the public ClinicalTrials.gov record and re-synced daily. It is not the sponsor's official website unless claimed. Nothing here is medical advice; eligibility is always determined by the study team — talk to your own doctor first.

Source record: clinicaltrials.gov/study/NCT06876714