CD4 and hereditary pheochromocytoma-paraganglioma: We found that it was positively correlated with most immune cells in LAML, skin cutaneous melanoma (SKCM), bladder urothelial carcinoma (BLCA), LUAD, pancreatic adenocarcinoma (PAAD), pheochromocytoma and paraganglioma (PCPG), KIRP, and lung squamous cell carcinoma (LUSC) and was also positively correlated with activated CD4+ T cells in LIHC.