Fig. 1From: A prospective observational study to assess PD-L1 expression in small biopsy samples for non-small-cell lung cancerThe typical cases for each TPS level: < 1, 1–49%, 50%≦. a The TPS was under 1%; no TPS. b The TPS was 20%; low TPS. c The TPS was 80%; high TPS. The TPS level was evaluated by pathologists who completed training courses in TPS estimationTPS: tumor proportion scoreBack to article page