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Table 1 Clinicopathological parameters of 170 breast cancer specimens analysed in this study.

From: Promoter methylation-associated loss of ID4expression is a marker of tumour recurrence in human breast cancer

Variable Categorisation n aanalysable %
Clinicopathologic parameters:    
Age at diagnosis: median 57 years (range 28–87)   
  <50 years 53 31.2
  ≥ 50 years 117 68.8
Tumour sizec    
  pT1 62 36.5
  pT2-4 91 53.5
  pT xb 17 10
Lymph node statusc    
  pN0 74 43.5
  pN1-3 62 36.5
  pN x 34 20
Histological grade    
  G1 14 8.2
  G2 79 46.5
  G3 61 35.9
  G x 16 9.4
Histological type    
  invasive ductal 128 75.3
  Invasive lobular 18 10.6
  other 24 14.1
Oestrogen receptor status    
  negative (IRSd 0–2) 52 30.6
  positive (IRS 3–12) 101 59.4
  IRS x 17 10
Progesterone receptor status    
  negative (IRS 0–2) 57 33.5
  positive (IRS 3–12) 96 56.5
  IRS x 17 10
  1. aOnly female patients with primary, unilateral, invasive breast cancer were included. bx status unknown. cAccording to TNM classification by Sobin and Wittekind [37]. d IRS= Immuno-reactive score according to Remmele and Stegner [38].