Single-dose Preoperative Partial Breast Irradiation in Low-risk Breast Cancer Patients

Recruiting now · Not applicable

Conditions studied: Breast Cancer

In brief

In this ABLATIVE-2 trial, low-risk breast cancer patients will be treated with MRI-guided single dose preoperative partial breast radiotherapy to assess the rate of pathologic complete response after an interval of six to twelve months between radiotherapy and surgery. Response monitoring will be assessed using MRI and markers in blood and tumor tissue to enable prediction of pathologic response.

Key facts

Study ID

NCT05350722

Run by

Amsterdam UMC, location VUmc

People needed

100

Starts

2022-08-24

Expected to finish

2037-12-01

Last updated by the study team

2026-07-16

Who can join

Age: 40 and older. Sex: female. Healthy volunteers: not accepted.

You may qualify if…

• WHO performance scale ≤2.
• Females at least 50 years of age with unifocal cT1N0 breast cancer on mammography, ultrasound and MRI.
• Patients with an indication for chemotherapy or HER2-targeted therapy according to Dutch National Oncoline Guidelines or own hospital protocols are not eligible. Patients with an indication for endocrine therapy are eligible.
• Tumor size as assessed on MRI.
• On tumor biopsy:
• Bloom-Richardson grade 1 or 2.
• Non-lobular invasive histological type carcinoma.
• LCIS or (non-extensive) DCIS is accepted.
• ER positive tumor receptor.
• HER2 negative tumor.
• Tumor-negative sentinel node (excluding isolated tumor cells).
• Adequate communication and understanding skills of the Dutch language.

You may not qualify if…

• Legal incapacity.
• BRCA1, BRCA2 or CHEK2 gene mutation.
• Distant metastasis.
• Previous history of breast cancer or DCIS.
• Other type of malignancy within 5 years before breast cancer diagnosis. Patients with adequately treated malignancy longer than 5 years before breast cancer diagnosis are eligible for inclusion.
• For adequately treated carcinoma in situ of the cervix or basal cell carcinoma of the skin no specific time span to breast cancer diagnosis is required for inclusion.
• Collagen synthesis disease.
• Signs of extensive DCIS component on histological biopsy or on imaging (e.g. no extensive calcifications on mammography).
• Invasive lobular carcinoma.
• MRI absolute contraindications as defined by the Department of Radiology.
• Nodal involvement with cytological or histological confirmation.
• Indication for treatment with (neo-)adjuvant chemotherapy.
• Non-feasible dosimetric RT plan.

Where it is running

• Amsterdam UMC — Amsterdam, Netherlands (enrolling)
• Flevoziekenhuis — Almere Stad, Netherlands (enrolling)
• Ziekenhuis Amstelland — Amstelveen, Netherlands (enrolling)
• Zaans Medisch Centrum — Zaandam, Netherlands (enrolling)
• Canisius Wilhelmina Ziekenhuis — Nijmegen, Netherlands (enrolling)
• Radboud UMC — Nijmegen, Netherlands (enrolling)
• GenesisCare — Sydney, Australia

Full record on ClinicalTrials.gov

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