LGALS9 and neoplasm: Furthermore, we found a significant positive correlation between tumor purity and promoter methylation (HAVCR2: beads 1–2, LGALS9: beads 7–12) and inverse correlations between tumor purity and mRNA expression as well as gene body methylation (HAVCR2: beads 5–6, LGALS9: bead 13) (see Additional file 1).