Five fractions ultrahypofractionated whole breast radiotherapy and simultaneous integrated boost to the tumor bed, for breast cancer patients with unfavorable characteristics
NCT ID NCT07020780
First seen Oct 22, 2026 · Last updated Oct 23, 2026 · Updated 1 time
Summary
This is a prospective, randomized, single-center, non-inferiority interventional clinical trial comparing whole breast irradiation (WBI) to a total dose of 26 Gy in 5 fractions with simultaneous integrated boost (SIB) to the tumor bed to a total dose of 30 Gy, and WBI to a total dose of 40.05 Gy in 15 fractions with SIB to the tumor bed to a total dose of 48 Gy (standard treatment), for young or unfavorable breast cancer patients.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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About 458 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Jul 2025
- Expected to finish
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Jun 2035
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 to 70 years
- Sex
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Female participants only
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: 1. Histological diagnosis of breast cancer 2. Patients younger than 40 years regardless of histological subtype, or patients between 40 and 70 years with lobular carcinoma, histological subtypes Luminal B Her2 positive, or with hormone receptors negative and Her2 positive (ErbB2), or triple negative (TNBC) 3. Signed informed consent 4. Clinical stage T1-T3, Nx-N3 5. Negative surgical margins (≥ 0.2 cm) 6. Clinical M0 in the previous 3 months 7. PS (ECOG) ≤2 8. No previous thoracic radiotherapy 9. Fertile women using contraceptive methods started during oncological treatment Exclusion Criteria: 1. Patients with favorable characteristics (Luminal A, Luminal B Her2 negative, ≥ 40 years) undergoing partial irradiation 2. Patients who have undergone mastectomy 3. Multicentric tumors 4. Positive or close surgical margins (\<0.2 cm) 5. BRCA1/2 positive (only if known) 6. Serious systemic diseases 7. Mental or other disorders that may prevent the patient from signing the informed consent 8. Previous invasive tumor, except skin cancer (excluding melanoma) unless the patient has been disease-free for at least 3 years (for example carcinoma in situ of the oral cavity or bladder) 9. Collagen or autoimmune diseases (systemic lupus erythematosus, rheumatoid arthritis, scleroderma, Sjogren's syndrome) 10. Evidence of distant metastases (M1) 11. Contraindication to treatment systemic 12. Pregnant women 13. Non-compliance with the dose limits established in the treatment plan
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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IRCCS San Raffaele Scientific Institute
RECRUITINGMilan, 20132, Italy
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Other studies related to the condition(s) this trial covers.
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- Toxicity and outcome of whole breast hypofractionated radiotherapy without boost: results of a homogeneous single institution experience
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