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Breast Cancer clinical trials in Fort Collins, CO

6 studies for Breast Cancer are looking for participants at sites in and around Fort Collins (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 →

The Vanguard Study: Testing a New Way to Screen for Cancer

RecruitingHealthy volunteers welcome
  • Poudre Valley Hospital, Fort Collins
  • Cancer Care and Hematology-Fort Collins, Fort Collins
Ages 45 to 75 · All sexes · Updated Oct 5, 2026 · NCT06995898

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

RecruitingObservational studyHealthy volunteers welcome
  • Poudre Valley Hospital, Fort Collins
  • Cancer Care and Hematology-Fort Collins, Fort Collins
Ages 40 to 75 · All sexes · Updated Oct 2, 2026 · NCT05334069

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
  • UCHealth Harmony, Fort Collins
Ages 18 and older · All sexes · Updated Sep 22, 2026 · NCT07174336

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
  • Poudre Valley Hospital, Fort Collins
  • Cancer Care and Hematology-Fort Collins, Fort Collins
Ages 50 to 70 · All sexes · Updated Apr 23, 2026 · NCT04852887

Survivors Uniting for Remote Guided Exercise

Recruiting
  • Human Performance Clinical Research Lab, Fort Collins
Ages 18 and older · All sexes · Updated Mar 31, 2026 · NCT07290309

Improving Care for Rural Patients With Solid Tumors

Recruiting
  • Poudre Valley Hospital, Fort Collins
Ages 18 to 99 · All sexes · Updated Feb 5, 2026 · NCT04916990

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 Fort Collins

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