Abstract
O, P'-DDD was given to a 41-year-old Japanese woman with metastatic adrenocortical carcinoma with dosage of 8g a day orally. The treatment resulted in objective regression of all metastases for 237 days. Significant decrease was seen in ketosteroid, 17-hydroxycorticosteroid, 17-ketogenic steroids, estrogen in the urine, 17-hydroxycorticosteroid, cortisol in plasma during the course of treatment.