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Table 1 Clinico-pathological characteristics

From: Protein and lipid MALDI profiles classify breast cancers according to the intrinsic subtype

Age, yr  
   Range 33-73
   Median 45
Gender  
   Female 34 (100%)
AJCC Stage  
   IA 6 (17.6%)
   IIA 16 (47.1%)
   IIB 1 (2.9%)
   IIIA 9 (26.4%)
   IIIB 2 (5.9%)
Location of primary tumor  
Unilateral 34 (100%)
   Right    18 (52.9%)
   Left    16 (47.1%)
Bilateral 0
Histologic classification  
Adenocarcinoma 30 (88.2%)
   Ductal    26 (86.7%)
   Lobular    1 (3.3%)
   Mixed ductal and lobular    1 (3.3%)
   Mucinous    2 (6.6%)
Metaplastic 4 (11.7%)
Immunohistochemistry  
Estrogen receptor (ER)  
   Positive 24 (70.6%)
   Negative 10 (29.4%)
Progesterone receptor (PR)  
   Positive 26 (76.5%)
   Negative 8 (23.5%)
HER2  
   Positive 14 (41.2%)
   Negative 20 (58.8%)
Ki67  
   < 15% 14 (41.2%)
   ≥15% 20 (58.8%)
Intrinsic subtype  
Adenocarcinoma 30 (88.2%)
   Luminal (ER+ and/or PR+)    18 (60.0%)
   HER2 (HER2+ regardless of ER status)    7 (23.3%)
   Triple negative (ER-, PR-, and HER2-)    5 (16.7%)
Metaplastic 4 (11.7%)
  1. AJCC, American Joint Committee on Cancer (7th Edition)