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Table 1 Relationships between the procedure used for axillary staging and clinicopathological factors

From: Is the sentinel lymph node biopsy more sensitive for the identification of positive lymph nodes in breast cancer than the axillary lymph node dissection?

Variable ALND (n = 320) SLNB (n = 830)
n % n %
Mean age (yrs) 59   58  
Mean tumor size (mm) 27   18  
Number of foci
  Unifocal 245 77 762 92
  Multifocal 75 23 68 8
Histologic grade
  Grade 1 48 15 192 23
  Grade 2 149 47 376 45
  Grade 3 123 38 262 32
Tumor location
  Lateral 169 53 447 54
  Medial 75 24 207 25
  Overlapping 62 19 151 18
  Retroareolar 13 4 25 3
pT
  pT1 112 35 557 67
  pT2-3 208 65 273 33
pN
  pN0 214 67 601 72
  pN > =1 106 33 229 28
Histologic subtype
  Ductal 251 78 694 84
  Other 69 22 136 16
Lymphovascular invasion
  Present 71 22 128 15
  Absent 246 77 687 83
  Unknown 3 1 15 2
Estrogen receptor
  Positive 270 84 743 90
  Negative 50 16 87 10
Progesteron receptor
  Positive 234 73 668 80
  Negative 86 27 162 20
HER-2
  Positive 31 10 75 9
  Negative 289 90 748 91