Recruiting
Omission of SLNB in CN0 Early Breast Cancer
The OMSLNB trial adopts a prospective, single-arm, non-inferiority, phase-II, open-label study design. Patients with unilateral invasive breast cancer （tumor ≤3cm） and assessed as cN0 will be eligible for inclusion, enrolled patients are required to complete 2 or more imaging tests including axillary ultrasound assessed as axillary lymph node negative, and other tests including MRI, PET-CT, \[18F\]-FDG PET-MRI, eligible patients will avoid axillary surgery but will undergo breast surgery, which is not limited to…
ClinicalTrials.gov IDNCT05935150
PhaseNA
Enrollment311
SponsorThe First Affiliated Hospital with Nanjing Medical University
Age18 Years – 70 Years
SexFEMALE
About this study
The OMSLNB trial adopts a prospective, single-arm, non-inferiority, phase-II, open-label study design. Patients with unilateral invasive breast cancer （tumor ≤3cm） and assessed as cN0 will be eligible for inclusion, enrolled patients are required to complete 2 or more imaging tests including axillary ultrasound assessed as axillary lymph node negative, and other tests including MRI, PET-CT, \[18F\]-FDG PET-MRI, eligible patients will avoid axillary surgery but will undergo breast surgery, which is not limited to breast-conserving surgery (BCS). So as to decrease the edema of upper arm, and finally improve the quality of life of the patients.
Interventions
- Procedure: Omit SLNB — All patients enrolled have to receive two or more imaging tests including axillary ultrasound assessed as axillary lymph node negative, and other tests including MRI, PET-CT, \[18F\]-FDG PET-MRI, axillary surgery will be omitted for eligible patients, and BCS or mastectomy (allowing breast reconstruction) will be chosen voluntarily by the patient under the premise of ensuring therapeutic efficacy, patients receiving BCS must undergo whole breast irradiation (WBI) after surgery, and the radiotherapy target area does not include the axillary region.
Primary outcomes
- invasive Disease-Free Survival (iDFS) (3 years)
Eligibility information
Inclusion Criteria:
1. Female patients aged 18-70 years;
2. Pathologically confirmed invasive breast cancer (regardless of pathological type) with a tumor diameter ≤ 3 cm, and planning to undergo breast surgery;
3. Negative axillary lymph nodes assessed by physical examination and imaging (2 or more of the following tests including ultrasound, breast MRI, breast PET-CT, breast PET-MRI, breast PET);
4. All patients are required to undergo immunohistochemical staining for Estrogen Receptor (ER), Progesterone Receptor (PR), human epidermal growth factor receptor 2 (HER2), Ki-67 proliferation index, and further fluorescence in situ hybridization (FISH) should be performed in HER2 2+ cases;
5. Good compliance, normal comprehension and ability to receive treatment and follow-up as required;
6. ECOG score 0-1;
7. Patients volunteered for this study and signed the informed consent form.
Exclusion Criteria:
1. Bilateral/lactating/pregnant breast cancer;
2. Previous history of malignant tumor or neoplasm;
3. Clinical or imaging confirmation of distant metastasis;
4. History of previous surgery on the affected axilla; or history of surgery affecting the function of the upper extremity;
5. Prior history of radiotherapy to the breast or chest;
6. Positive pathological margins after breast-conserving surgery or mastectomy;
7. Severe coagulation disorder, or a serious systemic disease, or an uncontrollable infection;
8. Aspartate aminortransferse (AST) and Alanine aminotransferase (ALT) ≥ 1.5 times the upper limit of normal, alkaline phosphatase ≥ 2.5 times the upper limit of normal, total bilirubin ≥ 1.5 times the upper limit of normal, serum creatinine ≥ 1.5 times the upper limit of normal; left ventricular injection fraction (LVEF) \< 50% on cardiac ultrasound;
9. Inability to complete the full course of follow-up adjuvant therapy as prescribed by the doctor for various reasons;
10. No personal freedom and independent civil capacity;
11. Presence of mental disorders, addictions, etc;
12. Not eligible for enrollmentas as judged by the investigator.
Study locations
- the First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu China
Before you participate: Varda Clinical is an independent discovery tool, not the study sponsor or a medical provider. Eligibility can only be determined by the official study team. Discuss potential risks and benefits with a qualified healthcare professional.
Source: ClinicalTrials.gov. Record last refreshed by Varda Clinical: 2026-10-26.