DDX5 and hereditary pheochromocytoma-paraganglioma: There were no significant differences in DDX5 mRNA expression among kidney renal clear cell carcinoma (KIRC), kidney renal papillary cell carcinoma (KIRP), liver hepatocellular carcinoma (LIHC), pheochromocytoma and paraganglioma (PCPG), and non-tumor tissues.