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Clinical trialNCT03414970Active, not recruitingPhase 3Interventional

Hypofractionated Radiation Therapy After Mastectomy in Preventing Recurrence in Patients With Stage IIa-IIIa Breast Cancer

SponsorAlliance for Clinical Trials in OncologyEnrollment898Ductal Breast CarcinomaInvasive Breast CarcinomaLobular Breast CarcinomaMedullary Breast CarcinomaStage II Breast CancerStage IIA Breast Cancer+3 more conditions
View the registry record on ClinicalTrials.gov

Summary

The registered summary isn't in our current data snapshot. Read it on the ClinicalTrials.gov record ↗. Why? →

Investigators

The overall officials registered on this study. Names that resolve to a findmyKOL profile link to it; the rest are shown as registered.

A profile link is shown only when the registered name resolves to a person record with a confident, namesake-checked match; ambiguous names stay unlinked.

Sites

859 registered facilities, with the per-site recruitment status where the registry publishes one. ClinicalTrials.gov does not publish per-site enrollment counts.

Canada
  • Tom Baker Cancer Centre

    Calgary, Alberta, Canada

  • Bcca-Cancer Centre for the Southern Interior

    Kelowna, British Columbia, Canada

  • Bcca-Vancouver Island Cancer Centre

    Victoria, British Columbia, Canada

  • Royal Victoria Regional Health Centre

    Barrie, Ontario, Canada

  • Juravinski Cancer Centre at Hamilton Health Sciences

    Hamilton, Ontario, Canada

  • Stronach Regional Health Centre at Southlake

    Newmarket, Ontario, Canada

  • Odette Cancer Centre- Sunnybrook Health Sciences Centre

    Toronto, Ontario, Canada

  • University Health Network-Princess Margaret Hospital

    Toronto, Ontario, Canada

  • Cisss de L'Outaouais

    Gatineau, Quebec, Canada

  • Chum - Centre Hospitalier de L'Universite de Montreal

    Montreal, Quebec, Canada

  • Ciusssemtl-Hopital Maisonneuve-Rosemont

    Montreal, Quebec, Canada

  • Jewish General Hospital

    Montreal, Quebec, Canada

  • Chu de Quebec-L'Hotel-Dieu de Quebec (hdq)

    Québec, Quebec, Canada

United States
  • Alaska Breast Care and Surgery Llc

    Anchorage, Alaska, United States

  • Alaska Oncology and Hematology Llc

    Anchorage, Alaska, United States

  • Alaska Women'S Cancer Care

    Anchorage, Alaska, United States

  • Anchorage Associates in Radiation Medicine

    Anchorage, Alaska, United States

  • Anchorage Oncology Centre

    Anchorage, Alaska, United States

  • Anchorage Radiation Therapy Center

    Anchorage, Alaska, United States

  • Katmai Oncology Group

    Anchorage, Alaska, United States

  • Providence Alaska Medical Center

    Anchorage, Alaska, United States

  • Fairbanks Memorial Hospital

    Fairbanks, Alaska, United States

  • Kingman Regional Medical Center

    Kingman, Arizona, United States

  • Cancer Center at Saint Joseph'S

    Phoenix, Arizona, United States

  • Mercy Hospital Fort Smith

    Fort Smith, Arkansas, United States

  • Chi Saint Vincent Cancer Center Hot Springs

    Hot Springs, Arkansas, United States

  • University of Arkansas for Medical Sciences

    Little Rock, Arkansas, United States

  • Kaiser Permanente-Deer Valley Medical Center

    Antioch, California, United States

  • Mission Hope Medical Oncology - Arroyo Grande

    Arroyo Grande, California, United States

  • Pcr Oncology

    Arroyo Grande, California, United States

  • Providence Saint Joseph Medical Center/disney Family Cancer Center

    Burbank, California, United States

  • City of Hope Corona

    Corona, California, United States

  • Uc Irvine Health Cancer Center-Newport

    Costa Mesa, California, United States

  • City of Hope Comprehensive Cancer Center

    Duarte, California, United States

  • Epic Care-Dublin

    Dublin, California, United States

  • Kaiser Permanente Dublin

    Dublin, California, United States

  • Bay Area Breast Surgeons Inc

    Emeryville, California, United States

  • Epic Care Partners in Cancer Care

    Emeryville, California, United States

  • Kaiser Permanente-Fremont

    Fremont, California, United States

  • Fresno Cancer Center

    Fresno, California, United States

819 more sites on the registry record.ClinicalTrials.gov ↗

Site investigator names are published by ClinicalTrials.gov only while a study recruits, so completed studies list sites without them.

Drugs studied

No drug or biological interventions are in our data for this study — it may test a procedure, device or behavioral intervention, or the intervention list isn't in our current snapshot. See the registry record ↗. Why? →

Registration & key dates

Registry attributes as recorded on the ClinicalTrials.gov study record.

Start
12 Mar 2018
Primary completion
1 Feb 2024
Completion
31 Aug 2035
Last update posted
24 Feb 2026
Registered enrollment
898
Registry id
NCT03414970

Source: ClinicalTrials.gov, via the CTTI AACT database, data as of 12 Jul 2026. Registry facts are shown as registered by the study sponsor; findmyKOL does not interpret them.