I ts primary basic pathologic change is mammary duct dilation.S o it is called mammary duct ectasia is more rational.

• 从该病的病理发展过程看,这些命名只是反映了该病不同阶段的病理表现,最根本的病理变化是乳腺导管扩张,因此以乳腺导管扩张症命名最合理。