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Table 3 Comparison of primary tumor and metastatic tissue by HER2 status (PRIM-HER2 and MET-HER2 status, respectively)

From: The impact of HER2 phenotype of circulating tumor cells in metastatic breast cancer: a retrospective study in 107 patients

  Total MET-HER2-negative MET-HER2-positive
PRIM-HER2 status (total) 46 (100 %) 40/46 (87 %) 6/46 (13 %)
 Negative 42/46 (91 %) 37/42 (88 %) 5/42 (12 %)
 Positive 4/46 (9 %) 3/4 (7 %) 1/4 (25 %)
  1. Overall accuracy of MET-HER2 and PRIM-HER2 status: 83 %