IL4 and non-small cell lung carcinoma: To understand the dynamics of polarized TAMs in the context of lymphangiogenesis via VEGF-A and -C in NSCLC, A549 cells were co-cultured with THP-1 macrophages polarized by LPS (for M1 type) or interleukin 4 (IL4)/interleukin 13 (IL13) (for M2 type) treatment.