Clinical trialNCT01766297RecruitingPhase 2Interventional

Phase II Protocol of Proton Therapy for Partial Breast Irradiation in Early Stage Breast Cancer

SponsorProton Collaborative GroupEnrollment132Breast CancerBreast NeoplasmBreast TumorCancer of the Breast

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.

Andrew Chang, MD
Proton Collaborative Group
Study Chair
clinicaltrials.gov ↗

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

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

United States

Mayo Clinic
Scottsdale, Arizona, United States
Carlos Vargas, MD
Recruiting
California Protons Cancer Therapy Center
San Diego, California, United States
James Urbanic, MD
Recruiting
Northwestern Medicine Chicago Proton Center
Warrenville, Illinois, United States
Arpi Thukral, MD
Recruiting
Maryland Proton Treatment Center
Baltimore, Maryland, United States
Elizabeth Nichols, MD
Recruiting
Mclaren Proton Therapy Center
Flint, Michigan, United States
Brian Yeh, MD
Recruiting
New York Proton Center
New York, New York, United States
Isabelle Choi, MD
Recruiting
Oklahoma Proton Center
Oklahoma City, Oklahoma, United States
John Chang, MD
Recruiting
Inova Schar Cancer Institute
Fairfax, Virginia, United States
Ashish Chawla, MD
Recruiting
Hampton University Proton Therapy Institute
Hampton, Virginia, United States
Christopher Sinesi, MD
Recruiting

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: 28 Feb 2013
Primary completion: 31 Jan 2027
Completion: 31 Jan 2035
Last update posted: 9 Sept 2025
Registered enrollment: 132
Registry id: NCT01766297

clinicaltrials.gov ↗

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.