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Table 1 Biological characteristics of the patients and tumors by histologic group

From: Clinicopathological features of infiltrating lobular carcinomas comparing with infiltrating ductal carcinomas: a case control study

  Histopathology   
  Infiltrating ductal carcinoma Infiltrating lobular carcinoma Total  
Factor Number of patients
(n = 3621)
% Number of patients
(n = 95)
% Number of patients P value
Age, years       0.069
   >35 3,213 88.7 90 94.7 3,303  
   ≤35 406 11.3 5 5.3 413  
T stage       0.922
   T1 1,585 73.8 42 44.2 1,621  
   T2 1,780 49.2 49 51.6 1,825  
   T3 181 5 3 3.2 184  
   T4 72 2 1 1.1 73  
N stage       0.56
   N0 1,912 52.9 57 60 1,969  
   N1 924 25.6 22 23.2 946  
   N2 459 12.7 10 10.5 469  
   N3 316 8.8 6 6.3 322  
TNM stage       0.57
   Stage 1 1,066 29.5 28 29.5 1,094  
   Stage 2 1,703 47.2 49 51.6 1,752  
   Stage 3 840 23.3 18 18.9 858  
Bilaterality       0.013
Unilateral 3,495 96.5 89 93.7 3,526  
Bilateral 126 3.5 6 6.3 132  
ER receptor       0.003
Negative 1,088 37.4 15 20.3 1,103  
Positive 1,821 62.6 59 79.7 1,880  
PR receptor       0.23
Negative 1,221 42.9 25 35.7 1,246  
Positive 1,625 57.1 45 64.3 1,670  
HER-2       0.038
Negative 1,373 70.8 46 83.6 1,419  
Positive 567 29.2 9 16.4 576  
  1. ER = estrogen receptor; PR = progesterone receptor; HER-2 = human epidermal growth factor receptor-2.