About this trial
Female patients undergoing surgical treatment for early breast cancer and meeting the inclusion criteria for adjuvant breast radiotherapy were randomized into two groups. One group will receive adjuvant whole-breast radiotherapy in ultra-hypofractionated regimen of 26 Gy in 5 fractions. In contrast, the other group will receive partial breast irradiation with a dose of 26Gy in 5 fractions.
The study's objective is to compare the effects of both breast radiotherapy protocols in terms of locoregional disease control and survival and to compare the adverse effects of radiotherapy between the two protocols. To determine if there is a correlation between different parameters and the efficacy and degree of toxicity for both protocols.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Breast-conserving surgery
Invasive ductal carcinoma
Age ≥ 50
Tumor size ≤ 3 cm
Disqualifiers
Neoadjuvant systemic therapy
TNBC (triple-negative breast cancer)
Extensive intraductal component (EIC)
Lymphovascular invasion (LVI)
Trial design
Parallel
Treatments tested in this trial
Ultra-fractionated WBI
RadiationAn ultra-short course of radiotherapy with 26Gy in 5 fractions will be administered to the whole breast where the tumor was located.
Ultra-fractionated PBI
RadiationAn ultra-short course of radiotherapy with 26Gy in 5 fractions will be administered to the part of the breast where the tumor was located.
Treatment groups
Trial outcomes
Primary outcomes
Acute toxicity
Assessment of acute toxicity of radiotherapy in two radiotherapy regimens. Acute toxicity will be scored according to the Common Terminology Criteria for Adverse Events (CTCAE) scale version 5.0
Late toxicity
Assessment of late toxicity of radiotherapy in two radiotherapy regimens. Acute toxicity will be scored according to the Common Terminology Criteria for Adverse Events (CTCAE) scale version 5.0
Secondary outcomes
Local-regional control
Any newly suspicious skin change/s or palpable lymph node in the irradiated area that is/are pathologically proved to be locoregional tumor recurrence.
Disease-free survival
Disease-free survival refers to the time from adjuvant radiotherapy of breast cancer to clinically confirmed local recurrence, distant metastasis, second primary tumor diagnosis, or patient death.
Overall Survival
Time from adjuvant radiotherapy to death.
Distant metastasis occurrence
The time from adjuvant radiotherapy to the occurrence of distant metastasis.
Sponsors and contacts
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