1.良性肿瘤首先明确肿瘤的概念。肿瘤是机体中的成熟细胞或正在发育的正常细胞,在不同有关因素(包括物理、化学、生物、遗传、激素、营养及免疫反应性等)的长期作用下,呈现过度增生和异常分化形成的新生物。良性肿瘤是一组生长较慢,对机体危害相对较小的疾病。有如下生物学特性和临床表现特点:①良性肿瘤细胞似正常细胞,核分裂象少或缺如;②几乎均有 1. Benign tumors first clarify the concept of tumors. The tumor is a mature cell or a normal developing cell in the body. Under the long-term effects of various relevant factors (including physics, chemistry, biology, genetics, hormones, nutrition, and immunoreactivity, etc.), the tumor shows hyperplasia and abnormal differentiation. New creatures. Benign tumors are a group of diseases that grow slowly and cause relatively little harm to the body. There are the following biological characteristics and clinical manifestations: 1 Benign tumor cells are like normal cells, with little or no mitoses; 2 almost all have