Consistent with our findings, a recent study reported that the expression of the DDX21 gene was increased in a variety of cancers, including brain lower grade glioma, thymoma and lymphoid neoplasm diffuse large B-cell lymphoma, and that upregulation of DDX21 was correlated with shorter overall survival in patients with adrenocortical carcinoma, endocervical adenocarcinoma, kidney renal papillary cell carcinoma, or pancreatic adenocarcinoma [7]. This evidence concerns the gene DDX21 and thymoma.