COL4A2 and neoplasm: After retrieving the expression of COL4A2 in tumor tissues and paracancerous tissues of THCA patients from our TCGA (THCA) dataset, the transcript level and expression level of COL4A2 in THCA tissues were found to be significantly greater than those in paracancerous tissues (Figs. 2A and 2B), and patients with a higher transcript level of COL4A2 in THCA tissues had a lower overall survival rate (Fig. 2C).