Table 1 Statistical data of 16 patients who underwent SNLB before NAC and ALND at the time of breast cancer surgery

Age (years old)

47 (28–72)

Tumor size (mm)

25.1 (18.9–42.0)

Estrogen receptor

 Negative/positive

7 (43.8%)/9 (56.2%)

Progesterone receptor

 Negative/positive

10 (62.5%)/6 (37.5%)

HER2

 Negative/positive

8 (50.0%)/8 (50.0%)

Ki67

 Negative/positive

4 (25.0%)/12 (75.0%)

Intrinsic subtype

 HRBC/HER2BC/TNBC

9 (56.3%)/4 (25.0%)/3 (18.7%)

Tumor-infiltrating lymphocytes

 Low/high

4 (25.0%)/12 (75.0%)

Number of excised sentinel lymph nodes

 1/2/3

3 (18.7%)/6 (37.5%)/7 (43.8%)

Number of sentinel lymph nodes with metastasis

 1/2/3

12 (75.0%)/1 (6.3%)/3 (18.7%)

Size of sentinel lymph node itself (mm)

12.5 (9.1–26.3)

Size of metastatic lesion (μm)

3397 (2108–7281)

Clinical response

 cPR/cCR

14 (87.5%)/2 (12.5%)

Pathological complete response

 pCR/non-pCR

5 (31.2%)/11 (68.8%)

Number of lymph node dissection

9 (3–24)

Lymph node metastasis

 Negative/positive

12 (75.0%)/4 (25.0%)

Number of lymph node metastasis

 1/2/6

2 (12.5%)/1 (6.3%)/1 (6.3%)