Importantly, when we analysed the expression of P-VEGFR1(Tyr1213) by immunohistochemistry in the same samples, we found that sVEGFR1-i13 and P-VEGFR1(Tyr1213) immunostainings correlate in SQLC tumours (Fig. 6b, p = 0.005). The gene discussed is FLT1; the disease is neoplasm.