From: Challenges and improvements in HER2 scoring and histologic evaluation: insights from a national proficiency testing scheme for breast cancer diagnosis in China
Case
Histologic
type
grade
ER*
PR*
Ki67#
HER-2
A1
IMC
II
90%
60%
32.5% [20-50%]
2+/3+
A2
C-AD
0%
20% [10-30%]
2+
A3
ILC
III
60% [40-85%]
A4
80%
10% [5-15%]
1+/2+
A5
IBC-NST
70%
10%
15% [5-20%]