Table 2 PD-L1 expression in cholangiocarcinoma subtypes (tumor and stromal cells; PD-L1 antibody clone: SP263)
Tumor subgroups | Tumor | Stroma | ||
|---|---|---|---|---|
Positive | Negative | Positive | Negative | |
iCCA, n = 72 | ||||
n (%) | 8 (11) | 64 (89) | 22 (31) | 50 (69) |
% cells, median (range) | 15 (5–30) | n.a. | 5 (1–40) | n.a. |
pCCA, n = 57 | ||||
n (%) | 6 (11) | 51 (89) | 23 (40) | 34 (60) |
% cells, median (range) | 10 (5–80) | n.a. | 5 (2–30) | n.a. |
dCCA, n = 41 | ||||
n (%) | 5 (12) | 36 (88) | 25 (61) | 16 (39) |
% cells, median (range) | 10 (5–30) | n.a. | 5 (1–30) | n.a. |