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乳腺癌的形成机制主要包括遗传因素,饮食因素与肥胖,放射线与电离辐射,月经、婚育、哺乳因素,精神因素.交感神经的活动主要保证人体在紧张状态下的生理需要,但交感神经功能异常持续和增强时,则对身体的各个系统产生不利影响,对于植物神经紊乱来说,则会引起工作压力,焦虑担忧等.研究表明,交感神经系统的改变也是促进乳腺癌发生发展的重要原因.“,”Formation mechanism of breast cancer mainly includes genetic factors,diet and obesity,radioactive ray and ionizing radiation,menstrual,marriage,lactation factor and mental factors.Sympathetic nerve activity is mainly to ensure the needs of the physiology of the human body in a state of tension,while when sympathetic nerve function abnormal sustained and enhanced,the various systems of the body will receive adverse effects.For the plant nerve disorder,which can cause work stress,anxiety,worry and so on.With the further research of breast cancer in recent years,it shows that the change of sympathetic nervous system is an important reason for promoting the development of breast cancer.