ENO2 and kidney cancer: In a study applying immunohistochemistry with high sensitivity we found that practically all CCRCCs expressed erythropoietin as well as the neuroendocrine marker neuron-specific enolase (NSE) (Mjønes et al., 2017), the latter a marker with hitherto misrecognized reputation.We concluded that CCRCC (the dominating histological type of kidney cancer) (Mjønes et al., 2017; Waldum et al., 2022) originated from the EPC.