For example, β3-tubulin and PGP9.5 (also known as UCHL1) are expressed in breast, melanoma and prostate cancer cells (Goto et al., 2015; Kanojia et al., 2015), and mature neuron markers, including MAP2 and MAPT, are expressed in breast, gastric and lung cancer cells (Caillet-Boudin et al., 2015; Yang et al., 2019a). The gene discussed is UCHL1; the disease is lung cancer.