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Table 4 The nature of the classification of metastatic disease amongst false negative cases for patients with a positive sentinel lymph node 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

False negative cases ILC IDC Total cases P-value
   Macrometastatic (>2.0 mm) 5 (28%) 2 (18%) 7 (24%) 0.807
   Micrometastatic (≤ 2.0 mm) 11 (61%) 8 (73%) 19 (66%)  
   Unknown classification 2 (11%) 1 (9%) 3 (10%)  
   Total 18 (100%) 11 (100%) 29 (100%)  
  1. ILC, invasive lobular carcinoma; IDC, invasive ductal carcinoma