Breast conservation therapy (BCT) is a very compound problem in theory and practice . It relates to the development of the theory of breast cancer local treatments , the progress of the combined therapy .

• 保乳手术(Breast conservation therapy，BCT)在理论和临床上都是一个非常复杂的问题，它涉及到乳腺癌局部治疗理论的演变，综合治疗的逐渐完善与发展等各个方面的问题。