Figure 2. Scatter plots of serum CNPY2 isoform 2 concentrations in healthy controls and colorectal cancer (CRC) patients. (A) Comparison of serum CNPY2 isoform 2 levels between all patients and healthy controls. (B) Comparison of serum CNPY2 isoform 2 levels between patients at different stage and healthy controls. A Mann–Whiney U test was used to compare the CNPY2 isoform 2 levels between the two groups.