Table 2b.

PD-L1 expression of the primary and paired metastatic lesions in the untreated patients using 50% TPS as a threshold [I-III stages] (IV stages).

primary	metastases
	<50%	≥50%	total
<50%	[12] (11)	[0] (1)	[12] (12)
≥50%	[0] (1)	[4] (1)	[4] (2)
total	[12] (12)	[4] (2)	[16] (14)