Breast cancer clinical trials near Montreal
67 recruiting trials in the official registry · updated July 2026 · free · no account · no tracking · English & français
Searches within 160 km deliberately include sites across the US border — often a Canadian patient's nearest option.
Search near your location →Sustainable Implementation of the EXCEL Exercise Oncology Program Across Canada
Recruiting now5 sites
EXCEL will provide online and, where feasible, in-person exercise programs to individuals living with and beyond cancer (ILWBC). Research has shown that targeted programs that include tailored exercise prescriptions are more successful in h…
A Study of Izalontamab Brengitecan Versus Chemotherapy in Participants With Previously Untreated, Locally Advanced, Recurrent Inoperable, or Metastatic Triple-negative Breast Cancer Ineligible for Anti-PD(L)1 Drugs (IZABRIGHT-Breast01)
Recruiting nowPhase 2/3295 sites
The purpose of this study is to assess the efficacy and safety of iza-bren, a bi-specific antibody-drug conjugate against EGFR and HER3 with a topoisomerase inhibitor payload versus treatment of physician's choice (TPC) (paclitaxel, nab-pac…
A Study of Sacituzumab Tirumotecan (MK-2870) as a Single Agent and in Combination With Pembrolizumab (MK-3475) Versus Treatment of Physician's Choice in Participants With HR+/HER2- Unresectable Locally Advanced or Metastatic Breast Cancer (MK-2870-010)
Recruiting nowPhase 3259 sites
The purpose of this study is to compare sacituzumab tirumotecan as a single agent, and in combination with pembrolizumab, versus Treatment of Physician's Choice (TPC) in participants with hormone receptor positive/human epidermal growth fac…
Study of Patritumab Deruxtecan With Other Anticancer Agents in Participants With HER2 Positive Breast Cancer That Has Spread and Cannot Be Surgically Removed (MK-1022-009)
Recruiting nowPhase 1/218 sites
Researchers want to learn if patritumab deruxtecan (MK-1022) can treat certain breast cancers. The breast cancers being studied are HER2 positive unresectable locally advanced or metastatic (the cancer has spread to other parts of the body)…
A Clinical Study of Sacituzumab Tirumotecan (Sac-TMT, MK-2870) in People With Breast Cancer (MK-2870-032)
Recruiting nowPhase 3310 sites
Researchers are looking for new ways to treat types of breast cancer that are both: * High-risk, which means the cancer may have a higher chance of getting worse or coming back after treatment * Early-stage, which means the cancer is in th…
A Long-term Treatment Extension Study of Niraparib in Participants Who Completed a Prior GlaxoSmithKline/TESARO-sponsored Niraparib Study
Recruiting nowPhase 225 sites
This is a global extension study to provide continued access to niraparib and further characterize the long-term safety of niraparib treatment in participants who are currently receiving treatment with niraparib within GlaxoSmithKline/TESAR…
A Study of Sacituzumab Tirumotecan (Sac-TMT, MK-2870) as Monotherapy and in Combination With Pembrolizumab (MK-3475) in Participants With Triple-Negative Breast Cancer (MK-2870-011/TroFuse-011)
Recruiting nowPhase 3263 sites
Researchers want to know if sacituzumab tirumotecan given alone or with pembrolizumab can treat triple negative breast cancer (TNBC). The main goal of this study is to learn if people treated with sacituzumab tirumotecan alone or with pembr…
A Study of Imlunestrant (LY3484356) in Premenopausal Women With Estrogen Receptor-Positive (ER+) Human Epidermal Growth Factor Receptor 2 Negative (HER2-) Early Breast Cancer
Recruiting nowPhase 274 sites
This study will include two groups of patients: Cohort 1 and Cohort 2. Cohort 1: will help researchers learn how a medicine called imlunestrant (LY3484356) affects a specific type of breast cancer. Some patients will take both imlunestrant…
A Randomized Trial of Five Fraction Partial Breast Irradiation (RAPID2)
Recruiting nowPhase 330 sites
The primary objective of this study is to determine in women with node negative BC ≤3cm in size, if PBI compared to WBI, both given once-a-day over 1 week following BCS, is non-inferior for LR and reduces adverse cosmesis. The primary outco…
Radiation OmisSion in PAtients With CLinically Node Negative Breast Cancer Undergoing Lumpectomy
Recruiting now23 sites
To de-escalate radiation therapy in women with breast cancer.
Common questions
How do I find a breast cancer clinical trial near me in Canada?
Use Beacon's free search: enter "breast cancer", your age, and your location, and you'll see recruiting trials sorted by distance, each explained in plain language — including sites just across the US border. Beacon searches the full official registry and never requires an account.
Does joining a clinical trial cost money?
The study treatment and study-related tests are usually provided at no cost, and some trials help with travel. In Canada, your provincial health coverage continues to apply to your routine care — always confirm details with the study team.
Can I leave a clinical trial after joining?
Yes. Participation is always voluntary, and you can leave a trial at any time, for any reason, without losing your normal medical care.
Do I qualify for these trials?
Every trial has its own eligibility criteria. Beacon translates each trial's criteria into a plain-language checklist you can review and bring to your doctor — only the study team can confirm whether you qualify.
Page updated July 2026.