TGFB1 and metastatic malignant neoplasm in the lymph nodes: While these findings are exploratory, their study revealed a genotypic correlation between lymph node metastasis and transforming growth factor beta 1 (TGFB1) rs1800460 of 0.29 (p < 0.05) and its recessive GCTG haplotype of -0.32 (p < 0.05) [9].