to determine whether class i mhc expression might be developmentally regulated in adrenal medullary cells , the precursor cells of adrenal nb tumors , beta 2-microglobulin expression was measured in fetal and adult adrenal glands . beta 2-microglobulin expression was not evident in the neuroblasts of a 24-wk-old fetal adrenal gland , whereas beta 2-microglobulin expression was present in the adult adrenal medulla .
C0001625
adrenal gland
C0001629
adrenal medulla