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Table 1 CellSearch® images and patient characteristics

From: International study on inter-reader variability for circulating tumor cells in breast cancer

  Patients, number (%) CellSearch® images, number (%)
  n = 131 (100%) n = 272 (100%)
Dataset   
  Institute Jules Bordet 34 (26) 60 (22)
  Institute Curie 60 (46) 114 (42)
  University of Hamburg 37 (28) 98 (36)
Age, years   
  ≤50 58 (44) 108 (40)
  >50 66 (51) 147 (54)
  Unknown 7 (5) 17 (6)
ER   
  Negative 54 (41) 106 (39)
  Positive 68 (52) 139 (51)
  Unknown 9 (7) 27 (10)
HER2   
  Negative 103 (79) 193 (71)
  Positive 15 (11) 44 (16)
  Unknown 13 (10) 35 (13)
Histology grade   
  1 5 (4) 6 (2)
  2 46 (35) 85 (31)
  3 69 (53) 147 (54)
  Unknown 11 (8) 34 (13)
Histology   
  Ductal 99 (76) 202 (74)
  Lobular 10 (8) 12 (4)
  Other 7 (5) 18 (7)
  Unknown 15 (11) 40 (15)
Stage   
  M0 109 (83) 215 (79)
  M1 22 (17) 57 (21)
CTC count 1   
  <5 CTCs 90 (69) 150 (55)
  ≥5 CTCs 40 (30) 120 (44)
  Unknown 2 (1) 2 (1)
Systemic therapy before blood sample collection 2   
  No 87 (65) 168 (62)
  Yes 31 (24) 62 (23)
  Unknown 15 (11) 42 (15)
  1. 1One patient with two samples (<5 CTCs and ≥ 5CTCs) was included; 2two patients with samples before and after treatment were included. ER, estrogen receptor; CTC, circulating tumor cell; M0, non-metastatic; M1, metastatic.