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Table 2 The sentinel lymph node demographics for invasive lobular carcinomas and invasive ductal carcinomas

From: Comparison of intraoperative frozen section analysis for sentinel lymph node biopsy during breast cancer surgery for invasive lobular carcinoma and invasive ductal carcinoma

  ILC IDC Total cases P-value
Frozen section analysis of SLN     
   Positive 36 (28%) 33 (25%) 69 (26%) 0.622
   Negative 95 (73%) 100 (75%) 195 (74%)  
Permanent section analysis of SLN     
   Positive 54 (41%) 44 (33%) 98 (37%) 0.171
   Negative 77 (59%) 89 (67%) 166 (63%)  
Size of SLN metastasis (mm) 6.0 (0.5–25.0) 5.0 (0.1–32.0) 5.5 (0.1–32.0) 0.808
Classification of metastatic disease     
   Macrometastatic (>2.0 mm) 36 (28%) 28 (21%) 64 (24%) 0.378
   Micrometastatic (≤ 2.0 mm) 16 (12%) 12 (9%) 28 (11%)  
   Unknown classification 2 (1.5%) 4 (3%) 6 (2%)  
   No metastatic disease 77 (59%) 89 (67%) 166 (63%)  
  1. ILC, invasive lobular carcinoma; IDC, invasive ductal carcinoma; SLN, sentinel lymph node