Serum endognous glucocorticoid(Hydrocortisone,HC)was measured before and after operation by high performance liquid chromatography(HPLC) in 72 cases(75times of transplantation)having renal allotransplantation.The HC level and adrenal function residual rate(RR)in the group of stable renal function were 0 034±0 022 μmol/L a-洹 062±0 041,respectively;the HC and RR in the group of acute rejection were increased,the HC had a mean of 0 205±0 158 μmol/L and RR 0 458±0 382,(p