CYP11A1 and chronic primary adrenal insufficiency: For example, FGD/FGD-like conditions (MC2R, MRAP, NNT gene defects) can present with salt loss suggestive of adrenal hypoplasia, and alterations in STAR and CYP11A1 resulting in partial loss of protein function may have a predominant FGD-like phenotype (17, –, 20).