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Table 2 Clinical and pathologic characteristics of SLNB for subgroups based on clinical suspicion of lymph node metastasis

From: Feasibility of sentinel lymph node biopsy in breast cancer patients clinically suspected of axillary lymph node metastasis on preoperative imaging

Characteristics NSI* (n=147) SI* (n= 176) P(Chi-square test)
Mean age ± SD 51.90 ± 9.99 50.35 ± 9.60 0.790
Axillary recurrence    0.152
  No 146 171  
  Yes 1 5  
Recurrence    0.017
  No 143 159  
  Yes 4 16  
T stage    0.022
  pT1 112 120  
  pT2 34 45  
  pT3 1 11  
N stage    0.002
  pN0 129 127  
  pN1 17 35  
  pN2 1 7  
  pN3 0 7  
Stage    0.002
  Stage I 101 98  
  Stage IIA 37 41  
  Stage IIB 8 21  
  Stage IIIA 1 9  
  Stage IIIC 0 7  
Size of tumor, cm, mean ± SD 1.58 ± 0.89 2.06 ± 1.91 0.463
Histology    0.013
  G1 53 47  
  G2 74 73  
  G3 19 43  
Nuclear    0.005
  G1 28 22  
  G2 100 103  
  G3 18 45  
ER    0.009
  Negative 33 63  
  Positive 114 113  
PR    0.167
  Negative 48 71  
  Positive 98 105  
IHC    0.086
  Negative/1+ 81 92  
  2+ 40 38  
  3+ 23 45  
Lymphovascular invasion    0.013
  No 113 113  
  Yes 34 63  
  1. *Clinically suspicious for axillary LN metastasis on preoperative imaging techniques (SI) patients are those with any of preoperative imaging techniques, including US, MRI, and PET scan, who were suspected of axillary LN metastasis, and NSI are those not suspected of LN metastasis.ER,estrogen receptor; PR,progesterone receptor; IHC,immunohistochemistry.