Other PEDs include ACOX1 deficiency [MIM: 264470], caused by mutations in the ACOX1 gene and reported in about 30 patients; DBP deficiency [MIM: 261515], caused by mutations in the HSD17B4 gene encoding DBP and reported in over 100 patients; and AMACR deficiency [MIM: 614307] caused by mutations in the AMACR gene and reported in about 10 patients [2]. This evidence concerns the gene HSD17B4 and hyperinsulinemic hypoglycemia, familial, 4.