RSPO2 and colorectal carcinoma: Based on our finding, the normal-CRC showed the candidate genes, including APC, TP53, SOX9, TOPORS, LSR, CALM2, SHISA4, RSPO2, FBXW7, and SYF2. The APC, SOX9, SHISA4, and RSPO2 genes are members of the Wnt signaling pathway [11,65,74,77,78] (Figure 5).