Table 1

Frequency of immunostaining among arrayed breast carcinoma cases

AntigenInterpretable coresPositive staining (%)Negative staining (%)
ER755302 (40)453 (60)
HER2744150 (20)594 (80)
CK5/6788110 (14)678 (86)
CK1776535 (5)730 (95)
HER161482 (13)532 (87)
c-KIT761105 (14)656 (86)