Absolute NKp30 isoforms expression in distinct cancer patients (A–C). The absolute expression of NKp30A (A), NKp30B (B) and NKp30C (C) normalized to β2m was assessed by qRT-PCR from healthy volunteers (HV, N = 106), metastatic GIST (N = 126), NB (N = 199), melanoma (N = 151) and NSCLC (N = 76) cancer patients. One-way ANOVA: Kruskall–Wallis test with Dunn's multiple comparison test. (D). Correlation matrix between the relative expression of NKp30 A, B and C isoforms, NCR3 and NCR1 gene in NSCLC cancer patients using the Spearman correlation test. *p < 0.05, **p < 0.01, ***p < 0.001.