Evaluation of PD-L1 Expression in Tumor Tissue of Patients with Lung Carcinoma and Correlation with Clinical and Demographic Data
Table 4
PD-L1 expression in TMA slides (collective analysis).
Cell type
Evaluation method
Graduation
%
Tumor cell
Intensity
Absence
99
55.9
Weak
38
21.5
Moderate
16
9
Strong
4
2.3
Ignored
20
11.3
Tumor cell
Percentage (3 categories)
Absence
99
55.9
Up to 10%
0
0
From 11% to 50%
1
0.6
More than 50%
57
32.2
Ignored
20
11.3
Tumor cell
Percentage (2 categories)
Positive
58
32.8
Negative
99
55.9
Ignored
20
11.3
Intratumoral immune cells
Intensity
Absence
122
68.9
Weak
24
13.6
Moderate
6
3.4
Strong
5
2.8
Ignored
20
11.3
Intratumoral immune cells
Percentage (3 categories)
Absence
122
68.9
Up to 10%
4
2.3
From 11% to 50%
5
2.8
More than 50%
26
14.7
Ignored
20
11.3
Intratumoral immune cells
Percentage (2 categories)
Positive
35
19.8
Negative
122
68.9
Ignored
20
11.3
Positive: more than 5% stained cells. Negative: less than 5% stained cells. Missing: staining problems preventing classification into positive or negative.