Table 2.
Recent reports regarding PD‐L1 expression by immunohistochemical analysis in human PDA
| Ref | Author | Year | n | Antibody clone | Locus | Positive criteria | Positive rate (%) |
|---|---|---|---|---|---|---|---|
| 27 | Nomi et al. | 2007 | 51 | MIH1 | Cytoplasmic, membranous | ≥10% in the total tumor area | 39.2 |
| 32 | Wang et al. | 2010 | 81 | MIH1 | Cytoplasmic, membranous | >5% in the total tumor area | 49.4 |
| 23 | Hutcheson et al. | 2016 | 158 | E1L3N | Cytoplasmic, membranous | ≥10% in the total tumor area | 63.3 |
| 33 | Wang et al. | 2017 | 94 | No data | Membranous | Comprehensive score | 28.7 |
| This study | 2017 | 36 | SP142 | Cytoplasmic, membranous | >5% in the total tumor area | 30.6 | |
| This study | 2017 | 36 | SP142 | Membranous | >5% in the total tumor area | 16.7 |