TCam-2 cells express typical primordial germ cell and GCNIS marker genes (SOX17, PRAME, cKIT, TFAP2C, PRDM1/BLIMP1) and show a typical GCNIS/seminoma morphology (big roundish cells with a big nucleus and clear cytoplasm) [3,4,5,6]. Here, PRDM1 is linked to seminoma.