CXCL12 and thyroid gland carcinoma: Survival analysis based on TCGA data showed that the expression levels of SDC4, BCL2, CXCL12 and LPAR5 genes were not associated with DFS of patients with thyroid carcinoma; however, the high expression of FN1 and NMU genes significantly decreased DFS of patients with thyroid carcinoma (Figure 6).