Immunohistochemistry results showed the expression and distribution of AKR1C1 (Figure 7A), DPP4 (Figure 7B), GPX4 (Figure 7C), GSS (Figure 7D), HMGCR (Figure 7E), TFRC (Figure 7F), SQLE (Figure 7G), and PGD (Figure 7H) in thyroid cancer and normal tissues. Here, DPP4 is linked to thyroid cancer.