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Breast Cancer clinical trials in Sioux Falls, SD

18 studies for Breast Cancer are looking for participants at sites in and around Sioux Falls (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
  • Avera Cancer Institute, Sioux Falls
Ages 18 and older · All sexes · Updated Oct 5, 2026 · NCT06982521

Phase IIIb Study of Ribociclib + ET in Early Breast Cancer

RecruitingPhase 3
  • Sanford USD Medical Center, Sioux Falls
Ages 18 to 100 · All sexes · Updated Oct 2, 2026 · NCT05827081

Collecting Blood Samples From Patients With and Without Cancer to Evaluate Tests for Early Cancer Detection

RecruitingObservational studyHealthy volunteers welcome
  • Sanford Cancer Center Oncology Clinic, Sioux Falls
  • Sanford USD Medical Center - Sioux Falls, Sioux Falls
Ages 40 to 75 · All sexes · Updated Oct 2, 2026 · NCT05334069

A Clinical Study of Sacituzumab Tirumotecan (Sac-TMT, MK-2870) in People With Breast Cancer (MK-2870-032)

RecruitingPhase 3
  • Avera McKennan Hospital ( Site 0002), Sioux Falls
Ages 18 and older · All sexes · Updated Sep 25, 2026 · NCT06966700

Signatera-Guided CDK4/6 Inhibitor Therapy in Breast Cancer

Recruiting
  • Sanford Health, Sioux Falls
Ages 18 and older · All sexes · Updated Sep 23, 2026 · NCT07214532

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
  • Sanford Cancer Center, Sioux Falls
Ages 18 and older · All sexes · Updated Sep 22, 2026 · NCT07174336

A Study of Elacestrant Versus Standard Endocrine Therapy in Women and Men With ER+,HER2-, Early Breast Cancer With High Risk of Recurrence

RecruitingPhase 3
  • Avera Cancer Institute, Sioux Falls
Ages 18 and older · All sexes · Updated Sep 15, 2026 · NCT06492616

A Phase IIIb Study to Evaluate Camizestrant Plus Ribociclib in ER-positive, HER2-negative Advanced Breast Cancer

RecruitingPhase 3
  • Research Site, Sioux Falls
Ages 18 to 130 · All sexes · Updated Sep 8, 2026 · NCT07647328

Evaluating Minimal Residual Disease (MRD) Through Longitudinal Circulating Tumor DNA (ctDNA) Profiling in Breast Malignancies

RecruitingObservational study
  • Sanford - Sioux Falls, Sioux Falls
Ages 18 to 99 · All sexes · Updated Sep 3, 2026 · NCT07211178

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
  • Sanford Cancer Center Oncology Clinic, Sioux Falls
  • Avera Cancer Institute, Sioux Falls
  • Sanford USD Medical Center - Sioux Falls, Sioux Falls
Ages 18 to 60 · Women · Updated Sep 2, 2026 · NCT05879926

E-Mindfulness Approaches for Living After Breast Cancer

RecruitingPhase 3
  • Sanford Cancer Center Oncology Clinic, Sioux Falls
  • Sanford USD Medical Center - Sioux Falls, Sioux Falls
Ages 18 to 50 · All sexes · Updated Aug 4, 2026 · NCT06748222

A Study of Emiltatug Ledadotin (Emi-Le) in Participants With Solid Tumors

RecruitingPhase 1/2
  • Avera Cancer Institute, Sioux Falls
Ages 18 and older · All sexes · Updated Jun 29, 2026 · NCT05377996

Phase 3 Study of Gedatolisib as First-Line Treatment for Patients With HR-Positive, HER2-Negative Advanced Breast Cancer (VIKTORIA-2)

RecruitingPhase 3
  • Sanford Health, Sioux Falls
Ages 18 and older · All sexes · Updated May 18, 2026 · NCT06757634

I-SPY TRIAL: Neoadjuvant and Personalized Adaptive Novel Agents to Treat Breast Cancer

RecruitingPhase 2
  • Sanford Clinical Research, Sioux Falls
Ages 18 and older · All sexes · Updated May 6, 2026 · NCT01042379

Avera Cancer Sequencing and Analytics Protocol (ASAP)

RecruitingObservational study
  • Avera Cancer Institute, Sioux Falls
Ages 18 and older · All sexes · Updated Mar 27, 2026 · NCT05142033

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

RecruitingObservational study
  • Avera Cancer Institute, Sioux Falls
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 Sioux Falls

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