To determine the function of KDM2A in circFOXO3‐miR‐214 mediated tumor growth, we co‐infected SCC‐4 cells with KDM2A siRNA and circFOXO3/miR‐214 inhibitor, and detected the invasiveness of SCC‐4 by transwell assay (Figure 4E). This evidence concerns the gene KDM2A and neoplasm.