“…This rate of production was unaffected by the administration of 200 mg. of cortisone a day, the administered cortisone accounting for a rise of about 60 mg. in daily 17-ketogenic steroid excretion (Jepson et al, 1956) and the 17-ketosteroid excretion remaining essentially unchanged. Similar failure to suppress adrenocortical steroid production by means of cortisone has been reported in severe Cushing's syndrome due to adrenocortical hyperplasia resulting from increased production of corticotrophin (Segaloff et al, 1955;Laidlaw et al, 1955).…”