ER

PR

Her2

(−)

(+)

(−)

(+)

(−)

(+)

Before chenotherapy

11

31

12

30

31

11

After chemotherapy

13

29

13

29

28

14

x2

0.2

33

0.0

57

0.5

13

P

0.6

29

0.8

11

0.4

74