1　癌前病变的概念目前对于癌前病变的概念尚无公认的统一认识 ,在临床病理实际工作中 ,对这一概念的使用也极不一致。病理学认为 ,癌前病变系指出现于恶性肿瘤之前 ,形态学上出现某种程度的不典型增生 ,但其本身尚不具备恶性特征性改变 ,或认为某些较容易发展成为癌的病变。何 1 The concept of precancerous lesions There is no universal consensus on the concept of precancerous lesions. The use of this concept is very inconsistent in the actual work of clinical pathology. Pathology believes that precancerous lesions occur before the malignancy and have a certain degree of dysplasia in morphology. However, they do not have malignant characteristic changes in themselves, or they are considered to be more likely to develop into cancerous lesions. what