A disorder of sexual development characterized by severely reduced 17,20-lyase activity of CYP17A1, sex steroid deficiency with no deficiency in glucocorticoid and mineralocorticoid reserves, absent or disturbed pubertal development, and mild to severe methemoglobinemia that has_material_basis_in homozygous or compound heterozygous mutation in CYB5A on chromosome 18q22.3.