Pearson correlation analysis showed significant positive correlations of plasma protein concentrations with tumor size for CRP (r = 0.704; p = 4.95×10−3, n = 14), C9 (r = 0.673; p = 8.36×10−3, n = 14), and LRG1 (r = 0.731; p = 2.97×10−3, n = 14) (Table 5, S3 Fig), and a significant positive correlation of plasma protein concentrations with OS for GSN (r = 0.573; p = 3.21×10−2, n = 14) (Table 5, S3 Fig). Here, C9 is linked to neoplasm.