TARGeted Intraoperative radioTherapy With INTRABEAM as a Boost for Breast Cancer - A Quality Control Registry (TARGIT_BQR)

December 10, 2025 updated by: Elena Sperk, MD, Universitätsmedizin Mannheim

TARGeted Intraoperative radioTherapy With the INTRABEAM-System as an Advanced Boost in Patients With Breast Cancer - A Quality Control Registry in Germany (TARGIT BQR)

Quality Control Registry for IORT used as an anticipiated boost with 20 Gy at the applicator surface followed by EBRT

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Quality Control Registry of a standard treatment with intraoperative radiotherapy during breast conserving surgery with 20 Gy at the applicator surface as an advanced boost followed by a shortened external beam radiotherapy. This is a prospective phase IV study to evaluate real life data of IORT Boost. Study runs in Germany with 13 active centers recruiting. Due to the nature of the study (registry) there is no need for randomization. Inclusion of n = >1000 patients is planned.

Study Type

Observational

Enrollment (Actual)

1133

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Germany
      • Mannheim, Germany, 68167
        • University Medical Center Mannheim

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 85 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

All patients with breast cancer and a tumor diameter < 3,5 cm plannend for breast conserving surgery. Intraoperative radiotherapy (IORT) is applied as an advanced boost with 20 Gy at the applicator surface during surgery. Its feasibility was already shown. IORT as a boost is considered as one of several boost techniques in the S3-Leitlinie (national guideline) for breast cancer.

Description

Inclusion Criteria:

  • Tumor diameter < 3,5 cm
  • Informed consent

Exclusion Criteria:

  • No informed consent
  • Tumor size > 3,5 cm
  • No indication for a boost

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
IORT with 50 kV x-rays, 20 Gy
Boost with 20 Gy during BCS, EBRT with 46-50 Gy
Radiation: IORT with 20 Gy
Intraoperative radiotherapy with the INTRABEAM System with 20 Gy
Other Names:
  • Whole breast irradiation

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Number of Patients With Local Recurrence
Time Frame: 5 years
The follow-up was carried out every six months for the first two years, and then once a year. The follow-up always included a mammography in addition to a clinical examination. Kaplan-Meier-estimates were done to calculate the local recurrence rate
5 years

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Percentage of Patients With Chronic Higher Grade Fibrosis After IORT Boost
Time Frame: 84 months
Follow-up for toxicity assessment (LENT SOMA criteria: fibrosis, teleangiectasia, retraction, pain, breast edema, lymphedema, hyperpigmentation, ulceration) and oncological data took place before surgery, 6 weeks to 90 days after EBRT, 6 months after IORT, and then annually using standardized case report forms (CRFs).
84 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Universitätsmedizin Mannheim

Investigators

  • Principal Investigator: Elena Sperk, MD, Universitätsmedizin Mannheim

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

September 1, 2011

Primary Completion (Actual)

December 31, 2020

Study Completion (Actual)

December 31, 2020

Study Registration Dates

First Submitted

September 22, 2011

First Submitted That Met QC Criteria

September 22, 2011

First Posted (Estimated)

September 23, 2011

Study Record Updates

Last Update Posted (Estimated)

December 12, 2025

Last Update Submitted That Met QC Criteria

December 10, 2025

Last Verified

December 1, 2025

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • TARGIT BQR

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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