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Table 1 Distribution of clinicopathological variables and immunohistochemical markers

From: Ki67 proliferation in core biopsies versus surgical samples - a model for neo-adjuvant breast cancer studies

   n (%)
Age: median (range) 63 (25-88) years  
Primary breast cancer Yes 49 (98)
  No* 1 (2)
Tumor size <20 mm 30 (60)
  ≥20 and <50 mm 16 (32)
  ≥50 mm 4 (8)
Tumor type Ductal 44 (88)
  Lobular 5 (10)
  Mucinous 1 (2)
Histological grade 1 16 (32)
  2 19 (38)
  3 15 (30)
Estrogen receptor status** Positive 45 (90)
  Negative 4 (10)
Progesterone receptor status** Positive 37 (74)
  Negative 13 (26)
HER2 status*** Normal 32 (64)
  Amplified 8 (16)
  Unknown 10 (20)
Axillary node Status† Positive 19 (38)
  Negative 30 (60)
  Unknown 1 (20)
  1. * Four women had contralateral primary tumors and one woman had recurrent breast cancer in the ipsilateral breast.
  2. ** Positive estrogen and progesterone receptor status when ≥ 10%
  3. *** Patients ≥ 70 years of age and surgery before May 2008 did not routinely receive an HER2 test.
  4. † See reference given in text.