CancerDrs

Breast Cancer clinical trials in Washington

38 actively recruiting breast cancer trials at 31 sites across Washington.

Data from ClinicalTrials.gov · last refreshed

Payments from drug makers to the doctors running these trials

For 2 of the trials on this page, the pharmaceutical company funding the trial also disclosed payments to the physicians leading it — public data from the federal CMS Open Payments database. Paying clinical-trial investigators for site work is expected and necessary for industry-funded trials; the scale and source are simply useful context when you're deciding whether to enroll. See the full breast cancer transparency page →

Phase 3 Recruiting Academic/Other

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

This Phase III Trial evaluates whether breast conservation surgery and endocrine therapy results in a non-inferior rate of invasive or non-invasive ipsilateral breast tumor recurrence (IBTR) compared to breast conservation with breast radi…

Sponsor: NRG Oncology
NCT ID: NCT04852887
Sites in Washington:
  • PeaceHealth Saint Joseph Medical Center — Bellingham, Washington
  • Swedish Cancer Institute-Edmonds — Edmonds, Washington
  • Swedish Cancer Institute-Issaquah — Issaquah, Washington
  • Skagit Regional Health Cancer Care Center — Mount Vernon, Washington
  • Swedish Medical Center-Ballard Campus — Seattle, Washington
View on ClinicalTrials.gov →
Phase 3 Recruiting Academic/Other

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

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 complet…

Sponsor: Alliance for Clinical Trials in Oncology
NCT ID: NCT06876714
Sites in Washington:
  • Swedish Cancer Institute-Edmonds — Edmonds, Washington
  • Swedish Cancer Institute-Issaquah — Issaquah, Washington
  • Skagit Regional Health Cancer Care Center — Mount Vernon, Washington
  • Swedish Medical Center-First Hill — Seattle, Washington
  • Saint Joseph Medical Center Hematology and Oncology - Silverdale — Silverdale, Washington
View on ClinicalTrials.gov →
Phase 3 Recruiting Academic/Other

The CDK4/6 Inhibitor Dosing Knowledge (CDK) Study

The purpose of this study is to generate evidence on an alternative dosing strategy for CDK4/6 inhibitors to help more patients with Metastatic Breast Cancer (MBC) (age ≥ 65 years) tolerate side effects and stay on treatment longer, to der…

Sponsor: American Society of Clinical Oncology
NCT ID: NCT06377852
Sites in Washington:
  • Northwest Medical Specialties — Bonney Lake, Washington
  • Northwest Medical Specialties — Federal Way, Washington
  • Northwest Medical Specialties — Gig Harbor, Washington
  • Northwest Medical Specialties — Olympia, Washington
  • Northwest Medical Specialties — Puyallup, Washington
View on ClinicalTrials.gov →
Phase 3 Recruiting Industry

A Phase III Study of Dato-DXd With or Without Durvalumab Compared With Investigator's Choice of Chemotherapy in Combination With Pembrolizumab in Patients With PD-L1 Positive Locally Recurrent Inoperable or Metastatic Triple-negative Breast Cancer (TROPION-Breast05)

This is a Phase III, randomised, open-label, 3-arm, multicentre, international study assessing the efficacy and safety of Dato-DXd with or without durvalumab compared with investigator's choice chemotherapy in combination with pembrolizuma…

Sponsor: AstraZeneca
NCT ID: NCT06103864
Sites in Washington:
  • Research Site — Tacoma, Washington
View on ClinicalTrials.gov →
Phase 3 Recruiting Industry

A Study to Evaluate Efficacy and Safety of Giredestrant Compared With Fulvestrant (Plus a CDK4/6 Inhibitor), in Participants With ER-Positive, HER2-Negative Advanced Breast Cancer Resistant to Adjuvant Endocrine Therapy (pionERA Breast Cancer)

This is a Phase III, randomized, open-label multicenter study that will evaluate the efficacy and safety of giredestrant compared with fulvestrant, both in combination with the investigator's choice of a CDK4/6 inhibitor (palbociclib, ribo…

Sponsor: Hoffmann-La Roche
NCT ID: NCT06065748
Sites in Washington:
  • Northwest Medical Specialties — Tacoma, Washington
View on ClinicalTrials.gov →
Phase 3 Recruiting Industry

Capivasertib + CDK4/6i + Fulvestrant for Advanced/Metastatic HR+/HER2- Breast Cancer (CAPItello-292)

A Phase Ib/III Open-label, Randomised Study of Capivasertib plus CDK4/6 Inhibitors and Fulvestrant versus CDK4/6 Inhibitors and Fulvestrant in Hormone Receptor-Positive and Human Epidermal Growth Factor Receptor 2-Negative Locally Advanced…

Sponsor: AstraZeneca
NCT ID: NCT04862663
Sites in Washington:
  • Research Site — Tacoma, Washington
View on ClinicalTrials.gov →
Phase 3 Recruiting Industry

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

This study will evaluate the efficacy and safety of the combination of inavolisib plus a cyclin-dependent kinase 4 and 6 inhibitor (CDK4/6i) and letrozole versus placebo plus a CDK4/6i and letrozole in the first-line setting in participant…

Sponsor: Hoffmann-La Roche
NCT ID: NCT06790693
Sites in Washington:
  • Swedish Cancer Institute - Edmonds Campus — Edmonds, Washington
  • Providence Regional Cancer Partnership — Everett, Washington
  • Swedish Cancer Institute - Issaquah — Seattle, Washington
  • Swedish Cancer Institute — Seattle, Washington
  • Northwest Medical Specialties — Tacoma, Washington
View on ClinicalTrials.gov →
Phase 3 Recruiting Industry

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

The efficacy and safety of zanidatamab in combination with physician's choice of chemotherapy compared with trastuzumab in combination with physician's choice of chemotherapy will be evaluated for the treatment of participants with metasta…

Sponsor: Jazz Pharmaceuticals
NCT ID: NCT06435429
Sites in Washington:
  • Fred Hutchinson Cancer Center — Seattle, Washington
View on ClinicalTrials.gov →
Phase 3 Recruiting Industry

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

This phase 3 clinical trial compares the efficacy and safety of palazestrant with ribociclib to letrozole and ribociclib in women and men who have not received prior systemic anti-cancer treatment for advanced breast cancer.

Sponsor: Olema Pharmaceuticals, Inc.
NCT ID: NCT07085767
Sites in Washington:
  • Clinical Trial Site — Olympia, Washington
  • Clinical Trial Site — Vancouver, Washington
View on ClinicalTrials.gov →
Phase 3 Recruiting Industry

BGB-43395 Plus Letrozole Versus CDK4/6i Plus Letrozole for Patients With Advanced or Metastatic HR+/HER2- Breast Cancer Who Have Not Received Prior Treatment for Advanced or Metastatic Disease

The purpose of this study is to investigate the efficacy and safety of BGB-43395 in combination with letrozole compared with investigator's choice of cyclin-dependent kinase 4/6 inhibitor (CDK4/6i) in combination with letrozole in patients…

Sponsor: BeOne Medicines
NCT ID: NCT07492641
Sites in Washington:
  • Northwest Medical Specialties — Tacoma, Washington
View on ClinicalTrials.gov →
Phase 2 Recruiting NIH

Targeted Therapy Directed by Genetic Testing in Treating Patients With Locally Advanced or Advanced Solid Tumors, The ComboMATCH Screening Trial

This ComboMATCH patient screening trial is the gateway to a coordinated set of clinical trials to study cancer treatment directed by genetic testing. Patients with solid tumors that have spread to nearby tissue or lymph nodes (locally adva…

Sponsor: National Cancer Institute (NCI)
NCT ID: NCT05564377
Sites in Washington:
  • Swedish Cancer Institute-Edmonds — Edmonds, Washington
  • Swedish Cancer Institute-Issaquah — Issaquah, Washington
  • Providence Regional Cancer System-Lacey — Lacey, Washington
  • Valley Medical Center — Renton, Washington
  • Swedish Medical Center-First Hill — Seattle, Washington
View on ClinicalTrials.gov →
Phase 1, Phase 2 Recruiting Industry

A Study of Disitamab Vedotin in Adults With HER2 Expressing Advanced Breast Cancer

The purpose of this clinical study is to learn about the safety and effects of the study medicine (called disitamab vedotin) for the possible treatment of people with breast cancer that is hard to treat and has spread in the body (advanced…

Sponsor: Pfizer
NCT ID: NCT06966453
Sites in Washington:
  • Swedish Cancer Institute — Seattle, Washington
  • Swedish Medical Center — Seattle, Washington
View on ClinicalTrials.gov →
Phase 2 Recruiting Academic/Other

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

The purpose of this study is to further advance the ability to practice personalized medicine by learning which new drug agents are most effective with which types of breast cancer tumors and by learning more about which early indicators o…

Sponsor: QuantumLeap Healthcare Collaborative
NCT ID: NCT01042379
Sites in Washington:
  • Swedish Cancer Institute — Seattle, Washington
  • University of Washington — Seattle, Washington
View on ClinicalTrials.gov →
Phase 1, Phase 2 Recruiting Industry

Rinatabart Sesutecan (Rina-S, PRO1184, GEN1184) for Advanced Solid Tumors (GCT1184-01/ PRO1184-001)

This study will test the safety, including side effects, and determine the characteristics of a drug called Rina-S in participants with solid tumors. Participants will have solid tumor cancer that has spread through the body (metastatic) o…

Sponsor: Genmab
NCT ID: NCT05579366
Sites in Washington:
  • Swedish Cancer Institute — Seattle, Washington
View on ClinicalTrials.gov →
Phase 1, Phase 2 Recruiting Industry

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

This study is open to adults aged 18 years and older with different types of HER2+ cancer that has spread and cannot be removed by surgery. People can take part in this study if their tumours show HER2 aberrations and previous treatment wa…

Sponsor: Boehringer Ingelheim
NCT ID: NCT06324357
Sites in Washington:
  • Fred Hutchinson Cancer Research Center — Seattle, Washington
View on ClinicalTrials.gov →
Phase 2 Recruiting Industry

A Phase 2 Neoadjuvant Study of Zanidatamab in Combination With Chemotherapy in Participants With HER2-positive Breast Cancer

The purpose of this study is to see if zanidatamab is safe and effective, when combined with chemotherapy, in treating people who has Human Epidermal Growth Factor Receptor 2 (HER2)-positive, early-stage breast cancer

Sponsor: Jazz Pharmaceuticals
NCT ID: NCT07102381
Sites in Washington:
  • Northwest Medical Specialties — Puyallup, Washington
  • Northwest Cancer Specialists — Vancouver, Washington
View on ClinicalTrials.gov →
Phase 2 Recruiting Industry

Study of PF-07248144 in Advanced or Metastatic Solid Tumors

This is an open-label, multi center study to evaluate safety, tolerability, pharmacokinetics (PK), and pharmacodynamics (PD) of PF-07248144 and early signs of clinical efficacy of PF-07248144 as a single agent and in combination with other…

Sponsor: Pfizer
NCT ID: NCT04606446
Sites in Washington:
  • Swedish Cancer Institute — Seattle, Washington
  • Swedish Medical Center — Seattle, Washington
View on ClinicalTrials.gov →
Phase 2 Recruiting Industry

ASPEN-09-03: A Study of Evorpacept in Combination With Trastuzumab and Chemotherapy in Metastatic HER2-Positive Breast Cancer

The Substudy Protocol ASPEN-09-03 is a Phase 2, single-arm, multicenter study evaluating the efficacy, safety, and tolerability of evorpacept in combination with trastuzumab and chemotherapy in participants with HER2-positive metastatic br…

Sponsor: ALX Oncology Inc.
NCT ID: NCT07007559
Sites in Washington:
  • Fred Hutchinson Cancer Center — Seattle, Washington
View on ClinicalTrials.gov →
Phase 2 Recruiting Industry

A Study To Evaluate The Efficacy And Safety Of Ifinatamab Deruxtecan (I-DXd) In Subjects With Recurrent Or Metastatic Solid Tumors (IDeate-PanTumor02)

This study is designed to assess the efficacy and safety of ifinatamab deruxtecan (I-DXD) in the following tumor types: endometrial cancer (EC); head and neck squamous cell carcinoma (HNSCC); pancreatic ductal adenocarcinoma (PDAC); colore…

Sponsor: Daiichi Sankyo
NCT ID: NCT06330064
Sites in Washington:
  • Wenatchee Hospitals and Clinics — Wenatchee, Washington
View on ClinicalTrials.gov →
Phase 2 Recruiting Industry

(Z)-Endoxifen for the Treatment of Premenopausal Women With ER+/HER2- Breast Cancer

This open-label research study is studying (Z)-endoxifen as a possible treatment for pre-menopausal women with ER+/HER2- breast cancer. (Z)-endoxifen belongs to a group of drugs called selective estrogen receptor modulators or "SERM", whic…

Sponsor: Atossa Therapeutics, Inc.
NCT ID: NCT05607004
Sites in Washington:
  • Fred Hutchinson Cancer Center — Seattle, Washington
View on ClinicalTrials.gov →
Phase 1, Phase 2 Recruiting Industry

A Study of PARG Inhibitor ETX-19477 in Patients With Advanced Solid Malignancies

This is a two-part, open-label, multicenter, dose escalation and dose expansion study designed to evaluate the safety, tolerability, pharmacokinetics (PK), pharmacodynamics (PDx), and anti- tumor activity of ETX-19477, a novel reversible s…

Sponsor: 858 Therapeutics, Inc.
NCT ID: NCT06395519
Sites in Washington:
  • Fred Hutchinson Cancer Center — Seattle, Washington
View on ClinicalTrials.gov →
Phase 2 Recruiting Academic/Other

Concurrent Neoadjuvant Chemo/Endocrine Therapy in HER2+ Breast Cancer

The usual approach to care for hormone receptor positive, HER2 positive breast cancer is chemotherapy and HER2 targeted therapy followed by endocrine therapy and surgery. The purpose of this Research Study is to see if taking endocrine the…

Sponsor: Legacy Health System
NCT ID: NCT07506876
Sites in Washington:
  • Legacy Salmon Creek Medical Center — Vancouver, Washington
View on ClinicalTrials.gov →
Phase 2 Recruiting Academic/Other

Concurrent WOKVAC Vaccination, Chemotherapy, and HER2-Targeted Monoclonal Antibody Therapy Before Surgery for the Treatment of Patients With Breast Cancer

This phase II trial studies the immunologic response and side effects of using the WOKVAC vaccine in combination with chemotherapy and HER2-targeted monoclonal antibody therapy before surgery in treating patients with breast cancer. Vaccin…

Sponsor: University of Washington
NCT ID: NCT04329065
Sites in Washington:
  • Fred Hutch/University of Washington Cancer Consortium — Seattle, Washington
View on ClinicalTrials.gov →

Showing 25 of 38 trials with sites in Washington. See all breast cancer trials →

Medical disclaimer: This page aggregates public ClinicalTrials.gov data. It is not medical advice. Always confirm eligibility and enrollment details with the trial site or your oncologist.

Source: ClinicalTrials.gov API v2 · Last checked: 2026-07-07