虽然对恶性肿瘤的产生原因及经过尚未得到解释,但不论在实际方面和理论方面都已得到很大的收获。例如从动物的实验肿瘤中很有成绩的研究了产生癌瘤的外在及内在的原因,并且在实验中从癌瘤的移植物及植入物得到了很好的効果。肿瘤的外科疗法和射线疗法已发展到很高的水 Although the cause and the cause of malignancy have not yet been explained, great gains have been made both in practical and theoretical aspects. For example, from the experimental tumors in animals, it has been very effective to investigate the external and intrinsic causes of cancer development, and excellent results have been obtained from cancer grafts and implants in experiments. Tumor surgical therapy and radiation therapy have developed to very high water