From: Immunohistochemical expression and prognostic value of PD-L1 in Extrapulmonary small cell carcinoma: a single institution experience
PD-L1 positive (n = 12)
PD-L1 negative (n = 22)
P value
Received treatment
10 (83%)
16 (73%)
Response rates to treatment
8 (80%)
11 (67%)
0.67
Median overall survival (mo.)
11.5
7
0.34