PKD1 and small cell lung carcinoma: PKD1 mRNA expression was significantly increased in NETs compared to NECs (p = 0.003) (data not shown), and the highest levels were detected in TC (RQ 2.72 (1.57–3.47)) vs. SCLC (RQ 1.57 (0.93–3.01)), LCNEC (RQ 0.88 (0.70–1.57)) and AC (RQ 2.46 (2.32–3.09)) (p = 0.005) (Figure 3C).