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Breast Cancer Clinical Trials near Seattle, WA

75 studies for Breast Cancer are recruiting at 187 sites within 50 miles of Seattle, Washington, according to ClinicalTrials.gov data processed .

Distances are city-level approximations. See all Breast Cancer trials in the US or all trials near Seattle.

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Breast Cancer studies enrolling near Seattle

Showing the 50 nearest of 75 studies.
  1. S1703 Serum Tumor Marker Directed Disease Monitoring in Patients With Hormone Receptor Positive Her2 Negative Metastatic Breast Cancer

    NCT03723928

    • Interventional
    • Ages 18 years and older
    • Sex: All

    Nearest sites: Kaiser Permanente Washington (Seattle, WA); Swedish Medical Center-Ballard Campus (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    15 sites within 50 mi
  2. 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

    NCT05879926

    • Phase 3
    • Ages 18 to 60 years
    • Sex: Female

    Nearest sites: FHCC at Northwest Hospital (Seattle, WA); Fred Hutchinson Cancer Center (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    15 sites within 50 mi
  3. Shorter Chemo-Immunotherapy Without Anthracycline Drugs for Early-Stage Triple Negative Breast Cancer

    NCT05929768

    • Phase 3
    • Ages 18 years and older
    • Sex: All

    Nearest sites: FHCC at Northwest Hospital (Seattle, WA); Fred Hutchinson Cancer Center (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    15 sites within 50 mi
  4. A Study of Elacestrant Versus Standard Endocrine Therapy in Women and Men With ER+,HER2-, Early Breast Cancer With High Risk of Recurrence

    NCT06492616

    • Phase 3
    • Ages 18 years and older
    • Sex: All

    Nearest sites: Fred Hutch CC at UWMC-Northwest (Seattle, WA); Fred Hutchinson Cancer Center (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    10 sites within 50 mi
  5. Collecting Blood Samples From Patients With and Without Cancer to Evaluate Tests for Early Cancer Detection

    NCT05334069

    • Observational
    • Ages 40 to 75 years
    • Sex: All
    • Accepts healthy volunteers

    Nearest sites: Swedish Medical Center-Ballard Campus (Seattle, WA); Swedish Medical Center-Cherry Hill (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    9 sites within 50 mi
  6. Pembrolizumab vs. Observation in People With Triple-negative Breast Cancer Who Had a Pathologic Complete Response After Chemotherapy Plus Pembrolizumab

    NCT05812807

    • Phase 3
    • Ages 18 years and older
    • Sex: All

    Nearest sites: FHCC at Northwest Hospital (Seattle, WA); Fred Hutchinson Cancer Center (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    9 sites within 50 mi
  7. A Study of Sigvotatug Vedotin in Advanced Solid Tumors

    NCT04389632

    • Phase 1
    • Ages 18 years and older
    • Sex: All

    Nearest sites: Swedish Cancer Institute (Seattle, WA); Swedish Medical Center (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    7 sites within 50 mi
  8. Assessing Benefits and Harms of Cannabis/Cannabinoid Use Among Cancer Patients Treated in Community Oncology Clinics

    NCT06418204

    • Observational
    • Ages 18 years and older
    • Sex: All

    Nearest sites: Kaiser Permanente Washington (Seattle, WA); Swedish Medical Center-First Hill (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    6 sites within 50 mi
  9. De-Escalation of Breast Radiation Trial for Hormone Sensitive, HER-2 Negative, Oncotype Recurrence Score Less Than or Equal to 18 Breast Cancer (DEBRA)

    NCT04852887

    • Phase 3
    • Ages 50 to 70 years
    • Sex: All

    Nearest sites: Swedish Medical Center-Ballard Campus (Seattle, WA); Swedish Medical Center-First Hill (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    5 sites within 50 mi
  10. Targeted Therapy Directed by Genetic Testing in Treating Patients With Locally Advanced or Advanced Solid Tumors, The ComboMATCH Screening Trial

    NCT05564377

    • Phase 2
    • Ages Any age
    • Sex: All

    Nearest sites: Swedish Medical Center-First Hill (Seattle, WA); Valley Medical Center (Renton, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    5 sites within 50 mi
  11. Adding an Immunotherapy Drug, MEDI4736 (Durvalumab), to the Usual Chemotherapy Treatment (Paclitaxel, Cyclophosphamide, and Doxorubicin) for Stage II-III Breast Cancer

    NCT06058377

    • Phase 3
    • Ages 18 years and older
    • Sex: All

    Nearest sites: Swedish Medical Center-First Hill (Seattle, WA); Swedish Cancer Institute-Edmonds (Edmonds, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    5 sites within 50 mi
  12. A Study Evaluating the Efficacy and Safety of Inavolisib Plus CDK4/6 Inhibitor and Letrozole vs Placebo + CDK4/6i and Letrozole in Participants With Endocrine-Sensitive PIK3CA-Mutated, Hormone Receptor-Positive, HER2-Negative Advanced Breast Cancer

    NCT06790693

    • Phase 3
    • Ages 18 years and older
    • Sex: All

    Nearest sites: Swedish Cancer Institute (Seattle, WA); Swedish Cancer Institute - Issaquah (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    5 sites within 50 mi
  13. S1501 Dual Observational and Randomized Cohort Study of Patients With Metastatic HER-2+ Breast Cancer at Risk of Cardiac Toxicity

    NCT03418961

    • Phase 3
    • Ages 18 years and older
    • Sex: All

    Nearest sites: FHCC South Lake Union (Seattle, WA); Swedish Medical Center-First Hill (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    4 sites within 50 mi
  14. MammaPrint, BluePrint, and Full-genome Data Linked With Clinical Data to Evaluate New Gene EXpression Profiles

    NCT03053193

    • Observational
    • Ages 18 years and older
    • Sex: All

    Nearest sites: Seattle Cancer Care Alliance (Seattle, WA); Swedish Cancer Institute (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    2 sites within 50 mi
  15. Study of PF-07248144 in Advanced or Metastatic Solid Tumors

    NCT04606446

    • Phase 2
    • Ages 18 years and older
    • Sex: All

    Nearest sites: Swedish Cancer Institute (Seattle, WA); Swedish Medical Center (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    2 sites within 50 mi
  16. A Clinical Study of Sacituzumab Tirumotecan (Sac-TMT, MK-2870) in People With Breast Cancer (MK-2870-032)

    NCT06966700

    • Phase 3
    • Ages 18 years and older
    • Sex: All

    Nearest sites: Fred Hutchinson Cancer Center ( Site 0069) (Seattle, WA); Northwest Medical Specialties, PLLC ( Site 0067) (Tacoma, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    2 sites within 50 mi
  17. Palazestrant in Combination With Ribociclib for the First-line Treatment of ER+/HER2- Advanced Breast Cancer

    NCT07085767

    • Phase 3
    • Ages 18 years and older
    • Sex: All

    Nearest sites: Clinical Trial Site (Seattle, WA); Clinical Trial Site (Olympia, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    2 sites within 50 mi
  18. SYNERGY-AI: Artificial Intelligence Based Precision Oncology Clinical Trial Matching and Registry

    NCT03452774

    • Observational
    • Ages Any age
    • Sex: All

    Nearest site: Massive Bio SYNERGY-AI site (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  19. Concurrent WOKVAC Vaccination, Chemotherapy, and HER2-Targeted Monoclonal Antibody Therapy Before Surgery for the Treatment of Patients With Breast Cancer

    NCT04329065

    • Phase 2
    • Ages 18 years and older
    • Sex: All

    Nearest site: Fred Hutch/University of Washington Cancer Consortium (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  20. The Evaluation of PC14586 in Patients With Advanced Solid Tumors Harboring a TP53 Y220C Mutation (PYNNACLE)

    NCT04585750

    • Phase 1/2
    • Ages 12 years and older
    • Sex: All

    Nearest site: University of Washington, Fred Hutchinson Cancer Center (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  21. Avelumab or Hydroxychloroquine With or Without Palbociclib to Eliminate Dormant Breast Cancer

    NCT04841148

    • Phase 2
    • Ages 18 years and older
    • Sex: All

    Nearest site: University of Washington (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  22. Solid Tumor Analysis for HLA Loss of Heterozygosity (LOH) and Apheresis for CAR T- Cell Manufacturing

    NCT04981119

    • Observational
    • Ages 18 years and older
    • Sex: All

    Nearest site: Fred Hutchinson Cancer Center (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  23. Personalized Neo-Antigen Peptide Vaccine for the Treatment of Stage IIIC-IV Melanoma, Hormone Receptor Positive HER2 Negative Metastatic Refractory Breast Cancer or Stage III-IV Non-Small Cell Lung Cancer

    NCT05098210

    • Phase 1
    • Ages 18 years and older
    • Sex: All

    Nearest site: Fred Hutch/University of Washington Cancer Consortium (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  24. A Study of NX-1607 in Adults With Advanced Malignancies

    NCT05107674

    • Phase 1
    • Ages 18 years and older
    • Sex: All

    Nearest site: Fred Hutchinson Cancer Center (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  25. A Study of Emiltatug Ledadotin (Emi-Le) in Participants With Solid Tumors

    NCT05377996

    • Phase 1/2
    • Ages 18 years and older
    • Sex: All

    Nearest site: Fred Hutchinson Cancer Center (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  26. A Study to Assess the Efficacy and Safety of FORE8394 in Participants With Cancer Harboring BRAF Alterations

    NCT05503797

    • Phase 2
    • Ages 8 years and older
    • Sex: All

    Nearest site: University of Washington School of Medicine (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  27. Quantitative MRI Assessment of Breast Cancer Therapy Response

    NCT05704062

    • Observational
    • Ages 18 years and older
    • Sex: All

    Nearest site: University of Washington (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  28. Online Nutrition Education to Decrease the Side Effects of Chemotherapy in Patients With Breast Cancer

    NCT05874297

    • Interventional
    • Ages 18 years and older
    • Sex: Female

    Nearest site: Fred Hutch/University of Washington Cancer Consortium (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  29. A Study to Evaluate the Efficacy and Safety of Inavolisib in Combination With Phesgo Versus Placebo in Combination With Phesgo in Participants With PIK3CA-Mutated HER2-Positive Locally Advanced or Metastatic Breast Cancer

    NCT05894239

    • Phase 3
    • Ages 18 years and older
    • Sex: All

    Nearest site: Swedish Medical Center (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  30. Remotely Delivered, Community-Aligned Weight Loss Interventions Among Breast Cancer Survivors, ¡Vida! Trial

    NCT05930483

    • Interventional
    • Ages 18 years and older
    • Sex: Female

    Nearest site: Fred Hutch/University of Washington Cancer Consortium (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  31. Evaluate BL-B01D1 in Patients With Metastatic or Unresectable Non-Small Cell Lung Cancer (NSCLC) and Other Solid Tumors

    NCT05983432

    • Phase 1
    • Ages 18 years and older
    • Sex: All

    Nearest site: University of Washington Fred Hutchinson (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  32. ARTIDIS Nanomechanical Generated Measurements for Early Breast Lesions

    NCT06085833

    • Interventional
    • Ages 18 years and older
    • Sex: All

    Nearest site: University of Washington (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  33. Functional Imaging in Prediction of Response to Abemaciclib for Advanced Hormone Receptor-Positive, HER2-Negative Breast Cancer

    NCT06179303

    • Phase 2
    • Ages 18 years and older
    • Sex: All

    Nearest site: Fred Hutch/University of Washington Cancer Consortium (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  34. A Phase 1/1b Study of IAM1363 in HER2 Cancers

    NCT06253871

    • Phase 1
    • Ages 18 years and older
    • Sex: All

    Nearest site: Fred Hutchinson Cancer Center (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  35. Beamion BCGC-1: A Study to Find a Suitable Dose of Zongertinib Used Alone and in Combination With Other Treatments to Test Whether it Helps People With Different Types of HER2+ Cancer That Has Spread

    NCT06324357

    • Phase 1/2
    • Ages 18 years and older
    • Sex: All

    Nearest site: Fred Hutchinson Cancer Research Center (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  36. A Study of PARG Inhibitor ETX-19477 in Patients With Advanced Solid Malignancies

    NCT06395519

    • Phase 1/2
    • Ages 18 years and older
    • Sex: All

    Nearest site: Fred Hutchinson Cancer Center (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  37. A Study Comparing the Efficacy and Safety of Zanidatamab to Trastuzumab, Each in Combination With Physician's Choice Chemotherapy, for the Treatment of Participants With Metastatic HER2-positive Breast Cancer

    NCT06435429

    • Phase 3
    • Ages 18 years and older
    • Sex: All

    Nearest site: Fred Hutchinson Cancer Center (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  38. [18F]FTT Positron Emission Tomography for the Measurement of PARP Tumor Expression in Patients With Metastatic Breast Cancer

    NCT06502691

    • Phase 1/2
    • Ages 18 years and older
    • Sex: All

    Nearest site: Fred Hutch/University of Washington Cancer Consortium (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  39. Hippocampal Avoidance in Craniospinal Irradiation for the Treatment of Leptomeningeal Metastases From Breast Cancer or Non-small Cell Lung Cancer

    NCT06518057

    • Phase 2
    • Ages 18 years and older
    • Sex: All

    Nearest site: Fred Hutch/University of Washington Cancer Consortium (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  40. SMP-3124LP in Adults With Advanced Solid Tumors

    NCT06526819

    • Phase 1/2
    • Ages 18 years and older
    • Sex: All

    Nearest site: University of Washington (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  41. QuantifyHER: Quantitative Immunofluorescence and/or RT-qPCR for Measuring HER2 in HER2-low Metastatic Breast Cancer

    NCT06551116

    • Observational
    • Ages 18 years and older
    • Sex: All

    Nearest site: University of Washington - Fred Hutchinson Cancer Center (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  42. Phase I Study of [177Lu]Lu-NNS309 in Patients With Pancreatic, Lung, Breast and Colorectal Cancers

    NCT06562192

    • Phase 1
    • Ages 18 to 100 years
    • Sex: All

    Nearest site: University Of Washington (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  43. A Study to Evaluate the Safety, Tolerability, Drug Levels, and Preliminary Efficacy of BMS-986507 Combinations in Adult Participants With Advanced Solid Tumors

    NCT06618287

    • Phase 1/2
    • Ages 18 years and older
    • Sex: All

    Nearest site: Swedish Medical Center (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  44. Open-Label Study of BBO-10203 in Subjects With Advanced Solid Tumors

    NCT06625775

    • Phase 1
    • Ages 18 years and older
    • Sex: All

    Nearest site: Fred Hutchinson Cancer Center (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  45. First in Human Study of TUB-030 in Patients With Advanced Solid Tumors

    NCT06657222

    • Phase 1/2
    • Ages 18 years and older
    • Sex: All

    Nearest site: Fred Hutchinson Cancer Center (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  46. A Study to Evaluate the Safety and Efficacy of A2B395, an Allogeneic Logic-gated CAR T, in Participants With Solid Tumors That Express EGFR and Have Lost HLA-A*02 Expression

    NCT06682793

    • Phase 1/2
    • Ages 18 years and older
    • Sex: All

    Nearest site: Fred Hutch Cancer Center (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  47. Study of ECI830 Single Agent or in Combination in Patients With Advanced HR+/HER2- Breast Cancer and in Patients With Other Advanced Solid Tumors

    NCT06726148

    • Phase 1/2
    • Ages 18 to 100 years
    • Sex: All

    Nearest site: Fred Hutch Cancer Research (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  48. BGB-21447 (Bcl-2 Inhibitor) Combinations for Adults With Hormone-Receptor Positive (HR+)/Human Epidermal Growth Factor Receptor 2 Negative (HER2-) Metastatic Breast Cancer

    NCT06756932

    • Phase 1
    • Ages 18 years and older
    • Sex: All

    Nearest site: Fred Hutchinson Cancer Research Center (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  49. Phase 3 Study of Gedatolisib as First-Line Treatment for Patients With HR-Positive, HER2-Negative Advanced Breast Cancer (VIKTORIA-2)

    NCT06757634

    • Phase 3
    • Ages 18 years and older
    • Sex: All

    Nearest site: Fred Hutchinson Cancer Center (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi
  50. A Study of CLSP-1025 in Adult Patients With Solid Tumors That Harbor the p53 R175H Mutation

    NCT06778863

    • Phase 1
    • Ages 18 years and older
    • Sex: All

    Nearest site: Fred Hutchinson Cancer Center (Seattle, WA)

    Distance to nearest recruiting site
    <1 mi (city-level)
    Recruiting sites
    1 site within 50 mi

FAQ

Common questions

What is a clinical trial?
A clinical trial is a research study in people that tests a medical, surgical or behavioral intervention, such as an investigational drug or device. Observational studies are also listed: they collect information without assigning a treatment. Read how clinical trials work.
Is there compensation for joining a Breast Cancer clinical trial?
Compensation for time and travel may be available, but it varies by study and some studies offer none. The amount and schedule are reviewed by an ethics board and described in the consent form. See compensation in clinical trials.
How do I check if I'm eligible?
Each study lists age, sex and other inclusion and exclusion criteria on its ClinicalTrials.gov record. Only the study team can confirm eligibility, usually through a screening call or visit. Talk with your own doctor before joining any study.

Source: ClinicalTrials.gov, data processed . Recruiting US sites filtered by distance and site status; summaries shortened.