Significant differences were observed in the protein concentration levels of S100P, PIGR, C1QBP, TAGLN, and CNN1 between cancer and inflammatory lesions (P ═ 0.0006, P ═ 0.0032, P ═ 0.0008, P < 0.0001, P ═ 0.0094, respectively). Here, CNN1 is linked to cancer.