Among these, GDF6 was positively correlated in 3 tumor types, such as LGG, THYM, and KIPAN, and negatively correlated in 10 tumor types, including COAD, COADREAD, BRCA, ESCA, STES, STAD, LIHC, TGCT, PCPG, and BLCA (Figure 3C). This evidence concerns the gene GDF6 and neoplasm.