FLT4 and neoplasm: The difference of expression level of LYVE–1 in tumor tissues of patients with N1a, N1b, N2a, and N2b staging was not found (P = 0.914); same results were found for VEGFR–3 (P = 0.493), Podoplanin (P = 0.199), and Prox–1 (P = 0.780).