<prompt> Adrenogenital syndrome is most commonly caused by?21 a hydroxilase deficiency17 a hydroxylase deficiency3 ss hydroxylase deficiencySteroid sulfatase deficiency  <response>: The most common type of congenital adrenal hyperplasia is deficiency of in boys--that becomes prominent as the child grows. There may also be decreased production of , low serum sodium concentrations hyponatremia, and high serum 