FZD7 and osteosarcoma: We found that the deletion of certain genes was associated with low mRNA expression, such as NLK, SOX1, MAPK8, MAP1B, and FZD7 genes (Figure 3).To further explore the expression level of Wnt signaling pathways and its effect on the downstream signaling, WNT1, β-catenin, c-myc, and cyclin D1 protein expression was measured by IHC in 46 osteosarcoma samples (Figure 4A-D).