肿瘤是在致病因素作用下,生物体组织细胞异常增生所形成的新生物,常见于人及动物身体内,分良性和恶性肿瘤两类,这里所说的是恶性肿瘤,即癌。国外抗肿瘤药市场情况据估计,发达国家中约有三分之一的人会在他们生命历程的不同阶段患上癌症,其中近四分 Tumor is a new organism formed by the abnormal proliferation of biological tissue cells under the action of pathogenic factors. It is commonly found in both human and animal body. It is divided into two types: benign and malignant tumors. Cancer refers to malignant tumor. Foreign anticancer drug market situation It is estimated that about a third of people in developed countries will develop cancer at different stages of their lives, of which nearly four points