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Showing 1–22 of 22 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: External Beam Partial-Breast Irradiation Clear all
Terminated No phase listed Observational

Patient Registry: Partial Breast Irradiation

NCT01127971
View directory record Official record
Conditions
Breast Cancer
Interventions
Not listed
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
19 Years and older
Enrollment
145 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
1
States / cities
Green Bay, Wisconsin
Source: ClinicalTrials.gov public record
Updated Oct 2, 2024 · Synced Sep 25, 2026, 1:36 PM EDT
Withdrawn Not applicable Interventional

Partial Breast Irradiation in a Low-risk Population Screened With MRI

NCT01255553
View directory record Official record
Conditions
Breast Cancer
Interventions
Partial Breast Irradiation
Radiation
Lead sponsor
University of Chicago
Other
Eligibility
40 Years and older · Female only
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Mar 3, 2014 · Synced Sep 25, 2026, 1:36 PM EDT
Completed Not applicable Interventional

Three Fraction Accelerated Partial Breast Irradiation as the Sole Method of Radiation Therapy for Low-risk Stage 0 and I Breast Carcinoma

NCT03612648
View directory record Official record
Conditions
Breast Carcinoma, Breast Cancer
Interventions
Three Fraction Accelerated Partial Breast Irradiation, Partial mastectomy
Radiation · Procedure
Lead sponsor
Washington University School of Medicine
Other
Eligibility
50 Years and older · Female only
Enrollment
77 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2026
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated May 4, 2026 · Synced Sep 25, 2026, 1:36 PM EDT
Recruiting Not applicable Interventional

Personalized Second Chance Breast Conservation (PSCBC): A Prospective Phase II Clinical Study

NCT04371913
View directory record Official record
Conditions
Breast Cancer
Interventions
600cGY x 5 fractions APBI, 270cGy x 15 fractions WBRT
Radiation
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
19 Years to 90 Years · Female only
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2035
U.S. locations
3
States / cities
Brooklyn, New York • New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 26, 2026 · Synced Sep 25, 2026, 1:36 PM EDT
Recruiting Phase 3 Interventional

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
View directory record Official record
Conditions
Stage I Breast Cancer
Interventions
Radiation and Endocrine Therapy (Tamoxifen, Anastrozol, Letrozole, Exemestane), Endocrine Therapy (Tamoxifen, Anastrozol, Letrozole, Exemestane)
Other · Drug
Lead sponsor
NRG Oncology
Other
Eligibility
50 Years to 70 Years
Enrollment
1,670 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2041
U.S. locations
812
States / cities
Birmingham, Alabama • Mobile, Alabama • Kingman, Arizona + 553 more
Source: ClinicalTrials.gov public record
Updated Apr 22, 2026 · Synced Sep 25, 2026, 1:36 PM EDT
Active, not recruiting Not applicable Interventional

Accelerated Partial Breast Irradiation Following Lumpectomy for Breast Cancer

NCT00185744
View directory record Official record
Conditions
Breast Cancer, Carcinoma, Ductal
Interventions
Intra-Operative Radiotherapy (IORT), Lumpectomy, Whole Breast Radiotherapy, Intracavitary Brachytherapy, Accelerated External Beam 3-D Conformal Radiotherapy, Stereotactic APBI
Radiation · Procedure
Lead sponsor
Stanford University
Other
Eligibility
40 Years and older · Female only
Enrollment
121 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2029
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Mar 19, 2026 · Synced Sep 25, 2026, 1:36 PM EDT
Completed Phase 2 Interventional Results available

Radiation Therapy in Treating Women With Locally Recurrent Breast Cancer Previously Treated With Repeat Breast-Preserving Surgery

NCT01082211
View directory record Official record
Conditions
Breast Cancer
Interventions
3D-Conformal External Beam
Radiation
Lead sponsor
Radiation Therapy Oncology Group
Network
Eligibility
18 Years to 120 Years · Female only
Enrollment
65 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2022
U.S. locations
57
States / cities
Peoria, Arizona • Burbank, California • Aurora, Colorado + 44 more
Source: ClinicalTrials.gov public record
Updated Jun 20, 2022 · Synced Sep 25, 2026, 1:36 PM EDT
Completed Not applicable Interventional Results available

External-Beam Partial-Breast Irradiation for Early Breast Cancer 40 Gy QD Over 2 Weeks

NCT01581619
View directory record Official record
Conditions
Breast Cancer
Interventions
External Beam Partial-Breast Irradiation
Radiation
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older · Female only
Enrollment
54 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2019
U.S. locations
4
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 1, 2020 · Synced Sep 25, 2026, 1:36 PM EDT
Active, not recruiting Not applicable Interventional

Accelerated Partial Breast Irradiation Study

NCT03437395
View directory record Official record
Conditions
Breast Cancer Female
Interventions
Balloon Brachytherapy, 3D Conformal External Beam Irradiation
Device · Radiation
Lead sponsor
Sentara Norfolk General Hospital
Other
Eligibility
50 Years and older · Female only
Enrollment
139 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2025
U.S. locations
1
States / cities
Harrisonburg, Virginia
Source: ClinicalTrials.gov public record
Updated Apr 1, 2025 · Synced Sep 25, 2026, 1:36 PM EDT
Active, not recruiting Phase 2 Interventional

Evaluating the Safety and Efficacy of a Novel Accelerated Partial Breast Irradiation Regimen

NCT05591547
View directory record Official record
Conditions
Breast Cancer
Interventions
IMRT/VMAT-Based Accelerated Partial Breast Irradiation
Radiation
Lead sponsor
Sanford Health
Other
Eligibility
50 Years and older · Female only
Enrollment
91 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
2
States / cities
Worthington, Minnesota • Sioux Falls, South Dakota
Source: ClinicalTrials.gov public record
Updated May 5, 2026 · Synced Sep 25, 2026, 1:36 PM EDT
Withdrawn Phase 2 Interventional

Breast-Conserving Surgery Followed by Radiation Therapy With MRI-Detected Stage I or Stage II Breast Cancer

NCT01100489
View directory record Official record
Conditions
Ductal Breast Carcinoma in Situ, Estrogen Receptor-negative Breast Cancer, Estrogen Receptor-positive Breast Cancer, HER2-negative Breast Cancer, HER2-positive Breast Cancer, Invasive Ductal Breast Carcinoma, Invasive Lobular Breast Carcinoma, Male Breast Cancer, Medullary Ductal Breast Carcinoma With Lymphocytic Infiltrate, Mucinous Ductal Breast Carcinoma, Papillary Ductal Breast Carcinoma, Progesterone Receptor-negative Breast Cancer, Progesterone Receptor-positive Breast Cancer, Stage I Breast Cancer, Stage II Breast Cancer, Tubular Ductal Breast Carcinoma
Interventions
external beam radiation therapy, questionnaire administration, therapeutic conventional surgery
Radiation · Other · Procedure
Lead sponsor
Case Comprehensive Cancer Center
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
3
States / cities
Cleveland, Ohio • Orange, Ohio • Westlake, Ohio
Source: ClinicalTrials.gov public record
Updated Dec 7, 2011 · Synced Sep 25, 2026, 1:36 PM EDT
Active, not recruiting Phase 2 Interventional

Partial Breast Irradiation (PBI) Using 40 Gy for Select Patients With Early Invasive or Noninvasive Breast Cancer

NCT01203839
View directory record Official record
Conditions
Breast Cancer
Interventions
multiple beams utilizing either intensity-modulated or 3D-conformal techniques
Radiation
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years and older · Female only
Enrollment
110 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2026
U.S. locations
8
States / cities
Basking Ridge, New Jersey • Middletown, New Jersey • Montvale, New Jersey + 5 more
Source: ClinicalTrials.gov public record
Updated Oct 5, 2025 · Synced Sep 25, 2026, 1:36 PM EDT
Completed Phase 2 Interventional Results available

A Study of Accelerated 3 Fraction Photon,Proton or Brachytherapy for Early Invasive and Noninvasive Breast Ca

NCT02453737
View directory record Official record
Conditions
Breast Cancer
Interventions
Brachytherapy APBI, 3D-CRT (photon) APBI, Proton APBI
Radiation
Lead sponsor
Mayo Clinic
Other
Eligibility
50 Years and older · Female only
Enrollment
170 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2022
U.S. locations
3
States / cities
Phoenix, Arizona • Jacksonville, Florida • Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Sep 18, 2024 · Synced Sep 25, 2026, 1:36 PM EDT
Active, not recruiting Not applicable Interventional

Single Fraction Accelerated Partial Breast Irradiation vs. Five Fraction Accelerated Partial Breast Irradiation for Low-risk Stage 0 and I Breast Carcinoma

NCT04849871
View directory record Official record
Conditions
Breast Carcinoma, Breast Cancer, Stage 0 Breast Cancer, Stage I Breast Cancer
Interventions
External Beam Accelerated Partial Breast Irradiation
Radiation
Lead sponsor
Washington University School of Medicine
Other
Eligibility
50 Years and older · Female only
Enrollment
134 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2029
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated May 5, 2026 · Synced Sep 25, 2026, 1:36 PM EDT
Completed Not applicable Interventional Results available

4D Image-Guided Partial Breast Radiation in Stage 0 and l Breast Cancer

NCT01646346
View directory record Official record
Conditions
Breast Cancer
Interventions
4D Conformal Image-Guided Partial Breast RT
Radiation
Lead sponsor
Yale University
Other
Eligibility
50 Years and older · Female only
Enrollment
46 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2017
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Nov 22, 2018 · Synced Sep 25, 2026, 1:36 PM EDT
Recruiting Not applicable Interventional

Multicenter Trial for Eliminating Breast Cancer Surgery or Radiotherapy in Exceptional Responders to Neoadjuvant Systemic Therapy

NCT02945579
View directory record Official record
Conditions
Estrogen Receptor Negative, HER2 Positive Breast Carcinoma, HER2/Neu Negative, Invasive Breast Carcinoma, Progesterone Receptor Negative, Stage I Breast Cancer AJCC v7, Stage IA Breast Cancer AJCC v7, Stage IB Breast Cancer AJCC v7, Stage II Breast Cancer AJCC v6 and v7, Stage IIA Breast Cancer AJCC v6 and v7, Stage IIB Breast Cancer AJCC v6 and v7, Triple-Negative Breast Carcinoma
Interventions
Undergo EBRT, Laboratory Biomarker Analysis, Quality-of-Life Assessment, Questionnaire Administration, Partial Breast Irradiation
Radiation · Other
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
30 Years and older · Female only
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2028
U.S. locations
8
States / cities
Gilbert, Arizona • Jacksonville, Florida • Honolulu, Hawaii + 5 more
Source: ClinicalTrials.gov public record
Updated Sep 24, 2026 · Synced Sep 25, 2026, 1:36 PM EDT
Recruiting Not applicable Interventional

Partial Breast Re-irradiation Using Ultra Hypofractionation (PRESERVE)

NCT05592938
View directory record Official record
Conditions
Breast Cancer, Breast Cancer Recurrent
Interventions
rPBI
Radiation
Lead sponsor
University Health Network, Toronto
Other
Eligibility
18 Years to 99 Years · Female only
Enrollment
171 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
3
States / cities
New York, New York • Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Jul 16, 2026 · Synced Sep 25, 2026, 1:36 PM EDT
Not listed Phase 2 Interventional

Accelerated Partial Breast Radiotherapy With Either Mammosite or Intensity Modulated Radiotherapy

NCT01185145
View directory record Official record
Conditions
Breast Cancer
Interventions
Breast Brachytherapy with Mammosite RTS, Intensity Modulated Radiotherapy
Radiation
Lead sponsor
Rocky Mountain Cancer Centers
Other
Eligibility
40 Years and older
Enrollment
291 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2024
U.S. locations
6
States / cities
Aurora, Colorado • Boulder, Colorado • Denver, Colorado + 3 more
Source: ClinicalTrials.gov public record
Updated Jul 10, 2013 · Synced Sep 25, 2026, 1:36 PM EDT
Completed Phase 1 Interventional Results available

Single Dose Partial Breast Radiotherapy

NCT00944528
View directory record Official record
Conditions
Breast Cancer
Interventions
Radiosurgery
Radiation
Lead sponsor
Duke University
Other
Eligibility
55 Years to 80 Years · Female only
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2023
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 26, 2023 · Synced Sep 25, 2026, 1:36 PM EDT
Recruiting Not applicable Interventional

Prospective Evaluation of Pencil Beam Scanning Proton Therapy for Previously Irradiated Tumors

NCT05313191
View directory record Official record
Conditions
CNS Cancer, Head and Neck Cancer, GI Cancer, Gynecologic Cancer, Prostate Cancer, Thoracic Cancer, Breast Cancer
Interventions
Pencil Beam Scanning Proton Therapy
Radiation
Lead sponsor
The New York Proton Center
Other
Eligibility
18 Years and older
Enrollment
1,800 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2028
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 12, 2026 · Synced Sep 25, 2026, 1:36 PM EDT
Terminated Not applicable Interventional Results available

Phyllodes Tumor Partial Breast Radiation Study

NCT01089374
View directory record Official record
Conditions
Phyllodes Tumor
Interventions
Partial breast radiation after lumpectomy
Radiation
Lead sponsor
Dartmouth-Hitchcock Medical Center
Other
Eligibility
18 Years and older · Female only
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2021
U.S. locations
1
States / cities
Lebanon, New Hampshire
Source: ClinicalTrials.gov public record
Updated Jul 24, 2023 · Synced Sep 25, 2026, 1:36 PM EDT
Recruiting Phase 2 Interventional

Study of 3-Day Partial Breast Radiation Therapy in Women With Breast Cancer

NCT04084730
View directory record Official record
Conditions
Invasive Ductal Breast Carcinoma, Invasive Ductal Carcinoma, Breast, DCIS, DCIS Grade 1, DCIS Grade 2, Breast Cancer
Interventions
Accelerated Partial Breast Irradiation
Radiation
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
45 Years and older · Female only
Enrollment
280 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2027
U.S. locations
9
States / cities
Norwalk, Connecticut • Miami, Florida • Basking Ridge, New Jersey + 6 more
Source: ClinicalTrials.gov public record
Updated Sep 20, 2026 · Synced Sep 25, 2026, 1:36 PM EDT