From: The association of genomic lesions and PD-1/PD-L1 expression in resected triple-negative breast cancers
IHC score
PD-1
PD-L1
Negative 0
0
3 (2)
Rare 1
9 (5)a
4 (2)
Low 2
17 (13)
15 (11)
Moderate 3
17 (12)
12 (9)
High 4
10 (8)
12 (7)
Very high 5
1 (1)
8 (8)