Omission of SLNB in CN0 Early Breast Cancer

Not Applicable

Recruiting

• Conditions: Clinically Assessed Negative Axillary Lymph Nodes; Breast Cancer; Sentinel Lymph Node

• Registration Number: NCT05935150
• Lead Sponsor: The First Affiliated Hospital with Nanjing Medical University

Brief Summary

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.

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2023-06-02
• Study Start: 2023-06-21
• Study First Submitted QC: 2023-07-04
• Study First Posted: 2023-07-07
• Status Verified: 2024-10
• Last Update Submitted: 2024-10-11
• Last Update Posted: 2024-10-15
• Primary Completion: 2027-07-01
• Study Completion: 2027-10-01

Recruitment & Eligibility

• Status: RECRUITING
• Sex: Female
• Target Recruitment: 311

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 & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Primary Outcome Measures

Name	Time	Method
invasive Disease-Free Survival (iDFS)	3 years	Time interval from the surgery to invasive local-regional recurrence, distant metastasis, contralateral invasive breast cancer, or death from any cause.

Secondary Outcome Measures

Name	Time	Method
Breast cancer-related lymphoedema (BCRL)	3 years	Objective evaluation of breast cancer-related lymphoedema (BCRL) by arm circumference measurements and bioelectrical impedance technology. In our study, BCRL is diagnosed in two ways：① Relative Volume Change (RVC ) \>10% in the affected upper extremity. ②Bioelectrical impedance technology: the impedance ratio is defined as the ratio of the impedance of the healthy upper limb to the impedance of the affected upper limb, and BCRL is diagnosed when the patient's impedance ratio is higher than the mean + 2 standard deviations (SD) of healthy controls, and BCRL will be diagnosed by meeting one of them.
Locoregional Recurrence (LRR)	3 years	This includes both local and regional recurrences. Local recurrence is defined as recurrence in the ipsilateral breast, chest wall, skin or surgical scar. Regional recurrence is defined as recurrence in the affected lymphatic drainage area, including the axilla, supraclavicular region, subclavicular region, and internal mammary node area.
Local Recurrence (LR)	3 years	Local recurrence is defined as recurrence in the ipsilateral breast, chest wall, skin or surgical scar.
Patient-reported outcomes (PROs)	3 years	Patients will be followed up with questionnaires using the FACT-B (Version 4.0) and Quick DASH at baseline, 1 week, 1, 3, 6, 12, 18, 24, and 36 months postoperatively, and the FACT-B scale will be used to assess changes in QoL from baseline to 3 years after surgery, and the Quick DASH scale will be used to assess changes in arm morbidity from baseline to 3 years after surgery.
Regional Recurrence (RR)	3 years	Regional recurrence is defined as recurrence in the affected lymphatic drainage area, including the axilla, supraclavicular region, subclavicular region, and internal mammary node area.

Trial Locations

Locations (1)

the First Affiliated Hospital of Nanjing Medical University; 🇨🇳 Nanjing, Jiangsu, China