NCT06960707 · Weill Medical College of Cornell University
Two Versus One Week Breast Radiotherapy (RT)
(PRATO)
What this study is about
This study is comparing two different radiation therapy approaches for early breast cancer to see which one is better for patients. One group will receive radiation over one week (based on the FAST-FORWARD trial), and the other group will receive radiation over two weeks with an extra focused dose (called a "concomitant boost").
View original scientific description
This study is comparing two different radiation therapy approaches for early breast cancer to see which one is better for patients. One group will receive radiation over one week (based on the FAST-FORWARD trial), and the other group will receive radiation over two weeks with an extra focused dose (called a "concomitant boost"). The study will look at how the treatments affect side effects, breast appearance, and cancer control in the breast.
Interventions
RADIATION
Radiation therapy - 1 week
2600 cGy whole breast radiotherapy in five fractions (Arm 1) over 1 week
RADIATION
Radiation therapy - 2 weeks
3200 cGy whole breast radiotherapy with a concomitant tumor bed boost to 3600 cGy in 10 fractions (Arm 2) over 2 weeks. In Arm 2, if no cavity is visible due to oncoplastic surgery, we will deliver 32 Gy to the whole breast only, without a boost.
Primary outcome measures
Rate of RT-related acute toxicity
Time frame: 1 month
The rate of RT-related acute toxicity is defined as cumulative acute toxicity events from the start of radiation treatment to 1 month follow up post RT. The toxicities will be graded by the research nurses assigned to the study according to Common Terminology Criteria for Adverse Events, version 5.0.
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Women status post segmental mastectomy. 2. If unilateral, pT1-2 breast cancer excised with negative margins. 3. If bilateral, pT1-2 breast cancer excised with negative margins AND/OR pTis excised with negative margins. 4. Clinically N0 (cN0 as determined by ultrasound/SOUND criteria) or pN0-1 or Nx or sentinel node negative. 5. Ductal carcinoma in situ DCIS with negative margins (no DCIS on inked margins). 6. Women with previous contralateral treated breast cancer can be enrolled in the trial.
Exclusion criteria
- Previous radiation therapy to the ipsilateral breast. 2. \>90 days from last surgery, unless s/p adjuvant chemotherapy. 3. \>60 days from last chemotherapy. 4. Male breast cancer. 5. Ongoing treatment for severe autoimmune disease.
Where
- New York, New York
Related conditions & keywords
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Jun 15, 2026 · Source of record for eligibility and locations