However, it has become better delineated that these tumours also express testis-specific genes such as the luteinising hormone/choriogonadotrophin receptor (LHCGR), insulin-like peptide 3 (INSL3) and 17 β-hydroxysteroid dehydrogenase 3 (HSD17B3) (2). This evidence concerns the gene HSD17B3 and neoplasm.