From: The prognostic role of PD-L1 expression and the presence of polyomavirus in Merkel cell carcinoma cases
PD-L1 < 1%
PD-L1 ≥ 1%
p-value
Negative MCPyV
19 (52.8%)
17 (47.2%)
0.003
Positive MCPyV
4 (13.8%)
25 (86.2%)
Total
23
42