人类目前还没有完全掌握癌症的形成、发展规律,所以还没有把握治愈这种疾病,特别是晚期癌症。癌症因此成为人们心目中一种可怕的疾病。癌症之所以可怕,还在于它的转移。有时摘除癌瘤的手术明明很成功,病人术后也感觉很好,并开始康复,不料癌症却已转移到一些原来正常的器官上,在那里又发生了癌变。癌症的转移给患者及其家属带来一种神秘的恐怖感,以致谈癌色变。癌实际上是上皮组织生长出来的恶性肿瘤,也称 Humans have not yet fully grasped the formation and development of cancer, so they have not yet been able to cure this disease, especially advanced cancer. Cancer has become a terrible disease in people’s minds. The reason why cancer is terrible is its transfer. Sometimes surgery to remove cancer is very successful. The patient also feels good after surgery and begins to recover. Unexpectedly, the cancer has been transferred to some of the normal organs where cancer has occurred. The transfer of cancer brings a mysterious sense of terror to the patients and their families. Cancer is actually a malignant tumor that grows from epithelial tissue. It is also called