Table 2: Comparison of PD-L1 expression between cancer resection and biopsy specimens by immunohistochemistry.
|
|
|
Resection |
Correlation coefficient |
|||
|
|
|
Negative (CPS<1) |
Low positive 1≤CPS<50 |
High positive (CPS≥50) |
Total |
|
|
Biopsy |
Negative (CPS<1) |
6 (15.4%) |
23 (59.0%) |
0 (%) |
29 (74.4%) |
0.234 |
|
Low positive (1≤CPS<50) |
0 (0%) |
8 (20.5%) |
0 (0%) |
8 (20.5%) |
||
|
High positive (CPS≥50) |
0 (0%) |
2 (5.1%) |
0 (0%) |
2 (5.1%) |
||
|
|
Total |
6 (15.4%) |
33 (84.6%) |
0 (0%) |
39 (100.0%) |
|
*CPS (Combined positive score): Number of PD-L1–positive cells [tumor cells, macrophages, lymphocytes] divided by the total number of tumor cells, multiplied by 100.