Registry for Intra-Operative Radiotherapy in Early Stage Breast Cancer

Research Registry for Intra-Operative Radiotherapy (IORT) During Breast Conserving Surgery in Patients With in Situ and Early Stage Breast Cancer

Saint John's Cancer Institute · NCT04603209

This study is trying to see if a new type of radiation treatment given during breast surgery is safe and effective for women with early stage breast cancer compared to the usual radiation therapy.

Quick facts

Study typeObservational
Enrollment1000 (estimated)
Ages18 Years and up
SexAll
SponsorSaint John's Cancer Institute (other)
Drugs / interventionsRadiation
Locations1 site (Santa Monica, California)
Trial IDNCT04603209 on ClinicalTrials.gov

What this trial studies

This prospective registry study enrolls women with early stage breast cancer undergoing intraoperative radiotherapy (IORT) during breast-conserving surgery. The aim is to validate the long-term effectiveness and safety of IORT by assessing patient outcomes, including complications, disease recurrences, and survival rates. The registry will compare these outcomes with traditional whole breast radiation therapy, filling a critical gap in existing data on IORT. This initiative is part of a broader effort to enhance breast cancer care at Providence Saint John's Health Center.

Who should consider this trial

Good fit: Ideal candidates are women with clinical stage Tis, T1, or T2 (≤ 3cm), N0, M0 breast cancer who are suitable for breast-conserving surgery.

Not a fit: Patients with advanced clinical stages (T3-4, N1-3, M1) or multifocal disease may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could provide valuable insights into the effectiveness of IORT, potentially improving treatment options for early stage breast cancer patients.

How similar studies have performed: While the use of IORT is growing, this registry aims to establish a comprehensive database of outcomes, making it a novel approach in assessing this treatment method.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Clinical stage Tis, T1, or T2(≤ 3cm), N0, M0 (AJCC Classification)
* Unifocal Disease
* Candidate for breast-conserving surgery
* Recommended treatment by multidisciplinary team

Exclusion Criteria:

* Clinical stage T3-4, N1-3, M1
* Multifocal disease

Where this trial is running

Santa Monica, California

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Early-stage Breast Cancer, Breast Carcinoma in Situ, Breast Neoplasms, Breast Cancer, Intraoperative Radiotherapy, IORT

Last reviewed 2026-05-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.