The Postoperative Radiotherapy in N1 Breast Cancer Patients
The Postoperative Radiotherapy After Breast Conserving Surgery or Mastectomy in N1 Breast Cancer Patients: a Prospective, Multicenter, Phase III Clinical Trial
Seoul National University Hospital
1,106 participants
Aug 1, 2022
INTERVENTIONAL
Conditions
Summary
This study is a multicenter, randomized, phase 3 clinical trial in patients with breast cancer, randomizing radiotherapy group (postmastectomy radiation therapy (PMRT)/whole breast irradiation plus regional radiotherapy (WBI+regional RT) versus and no PMRT/WBI alone group. This is a non-inferiority study aiming that there is no significant difference in the 7-year disease-free survival rate between the two groups.
Eligibility
Inclusion Criteria8
- Patients aged 19 years or older.
- A female patient who underwent breast-conserving surgery or mastectomy for invasive breast cancer.
- Patient with stage pN1 after surgery on histopathologic examination.
- However, if mastectomy was performed, 5 or more nodes should be resected in the case of 1 positive node, and axillary lymph node dissection (ALND) should be performed in case of 2 or 3 positive nodes.
- Patients undergoing or planning to undergo hormone therapy in the case of hormone receptor positive.
- Patients who have received or are expected to undergo targeted therapy in the case of human epidermal growth factor receptor(HER)-2 positive.
- Patients with Eastern Cooperative Oncology Group (ECOG) Scale 0-2.
- Patients who agreed to participate in the study.
Exclusion Criteria8
- Patients who have received prior \[neoadjuvant\] chemotherapy.
- Patients receiving radiation therapy for salvage or palliative purposes.
- Patients with stage T4.
- Patients with ipsilateral supraclavicular and internal mammary lymph node metastases or distant metastases.
- Male breast cancer patient.
- Patients who have previously received radiation therapy to the ipsilateral breast or supraclavicular region.
- Patients having a history of cancer other than thyroid cancer, cervical carcinoma in situ, or skin cancer.
- Patients diagnosed with ductal breast carcinoma in situ, lobular carcinoma in situ, phyllodes, metaplastic cancer, or benign tumors based on histological diagnosis.
Interventions
* Regional RT includes high-tangent field, and can include undissected axilla. * The definition of high-tangent is that the upper margin of the radiotherapy field located within 2 cm of the humeral head to include axillary levels I and II. * Both hypofractionated and conventionally fractionated radiation therapy are allowed, and 3-dimensional or intensity modulated radiotherapy are allowed. The electron beam can also be used.
* Regional RT includes high-tangent field, and can include undissected axilla. * The definition of high-tangent is that the upper margin of the radiotherapy field located within 2 cm of the humeral head to include axillary levels I and II. * Both hypofractionated and conventionally fractionated radiation therapy are allowed, and 3-dimensional or intensity modulated radiotherapy are allowed. The electron beam can also be used.
Locations(1)
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NCT05440149