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Breast Cancer clinical trials in Vallejo, CA

10 studies for Breast Cancer are looking for participants at sites in and around Vallejo (within about 30 miles). Open a study to see who can join and how to contact the study team.

Recruiting for a study here? Feature it at the top of this page — $99 for 30 days →

Phase 3 Study of RLY-2608 + Fulvestrant vs Capivasertib + Fulvestrant as Treatment for Locally Advanced or Metastatic PIK3CA-mutant HR+/HER2- Breast Cancer

RecruitingPhase 3
  • Kaiser Permanente Medical Center, Vallejo
Ages 18 and older · All sexes · Updated Oct 5, 2026 · NCT06982521

Distance-Based Exercise to Preserve Function and Prevent Disability

Recruiting
  • Kaiser Permanente-Vallejo, Vallejo
Ages 18 and older · All sexes · Updated Oct 2, 2026 · NCT07059884

Signatera-Guided CDK4/6 Inhibitor Therapy in Breast Cancer

Recruiting
  • Kaiser Permanente NorCal, Vallejo
Ages 18 and older · All sexes · Updated Sep 23, 2026 · NCT07214532

Palazestrant in Combination With Ribociclib for the First-line Treatment of ER+/HER2- Advanced Breast Cancer

RecruitingPhase 3
  • Clinical Trial Site, Vallejo
Ages 18 and older · All sexes · Updated Sep 23, 2026 · NCT07085767

A Study of Tersolisib (LY4064809/STX-478) With Other Anti-Cancer Treatments in Participants With Advanced Breast Cancer With a Genetic Change (PIK3CA)

RecruitingPhase 3
  • Kaiser Permanente, Vallejo
Ages 18 and older · All sexes · Updated Sep 22, 2026 · NCT07174336

Evaluating the Addition of Adjuvant Chemotherapy to Ovarian Function Suppression Plus Endocrine Therapy in Premenopausal Patients With pN0-1, ER-Positive/HER2-Negative Breast Cancer and an Oncotype Recurrence Score Less Than or Equal to 25

RecruitingPhase 3
  • Kaiser Permanente-Vallejo, Vallejo
  • Sutter Solano Medical Center/Cancer Center, Vallejo
Ages 18 to 60 · Women · Updated Sep 2, 2026 · NCT05879926

E-Mindfulness Approaches for Living After Breast Cancer

RecruitingPhase 3
  • Kaiser Permanente-Vallejo, Vallejo
Ages 18 to 50 · All sexes · Updated Aug 4, 2026 · NCT06748222

De-Escalation of Breast Radiation Trial for Hormone Sensitive, HER-2 Negative, Oncotype Recurrence Score Less Than or Equal to 18 Breast Cancer (DEBRA)

RecruitingPhase 3
  • Kaiser Permanente-Vallejo, Vallejo
  • Sutter Solano Medical Center/Cancer Center, Vallejo
Ages 50 to 70 · All sexes · Updated Apr 23, 2026 · NCT04852887

Assessing Benefits and Harms of Cannabis/Cannabinoid Use Among Cancer Patients Treated in Community Oncology Clinics

RecruitingObservational study
  • Kaiser Permanente-Vallejo, Vallejo
Ages 18 and older · All sexes · Updated Mar 17, 2026 · NCT06418204

EXActDNA-003 / NSABP B-64: Study of Molecular Residual Disease Detection in Breast Cancer (MRD)

RecruitingObservational study
  • Kaiser Permanente Medical Center, Vallejo
Ages 18 and older · All sexes · Updated Jan 20, 2026 · NCT06401421

About Breast Cancer

Breast cancer is a cancer that starts in the breast tissue, when cells change and grow out of control. These extra cells can form a mass called a tumor.

More about Breast Cancer on MedlinePlus

Breast Cancer trials in other cities

Other studies in Vallejo

From ClinicalTrials.gov, data retrieved Oct 6, 2026. Each study sets its own eligibility; the study team decides who can join.