MAGEA6 and CTAG2 are expressed in testis, and in very low levels in placenta but are observed to be highly expressed in NSCLC and various cancer types (Wang et al., 2004; McCormack et al., 2013; Pineda et al., 2015; Tsang et al., 2020). Here, CTAG2 is linked to non-small cell lung carcinoma.