Two measures are urgently needed to improve curative therapy results in cancer treatment. 1. Improvements in the early recognition of specific types of tumor and in appropriate modes of preventitive treatment.--2. The introduction of a metastasis prophylaxis before each diagnostic and therapeutic operation for cancer; several possibilities are proposed. The stagnation of cancer therapy results can only be overcome by an alteration in the current concept of treatment, which in cases of early cancer is as yet directed exclusively at the primary tumor.