AbstractWe have presented 7 patients in whom metastatic carcinoma regressed by chemotherapy alone. They are well without evidence of disease for 5 to 10 years. The patients include 4 embryonal carcinoma of the testis, 1 uterine chorioepithelioma, 1 prostatic sarcoma, and 1 trabeculo‐follicular epithelioma of the thyroid. They received 1 or more courses of chemotherapy (trenimon or nitromin alone, or triple association actinomycin D, methotrexate, and cytoxan). We cannot explain why these are apparently cured and why others, treated with the same drugs, had no regression at all. No immunological studies were don