They assessed in the perirenal region of PPGL higher expression of UCP1, CIDEA, ELOVL3, EBF3, FBXO31 and LHX8, but not TNFSRF9, TBX1 or TMEM26, in comparison with seven subjects with non-functional adrenal tumors [47]. This evidence concerns the gene FBXO31 and adrenal gland neoplasm.