同意楼上意见。

有时候觉得UDH和ADH从HE上很难鉴别，由于两者的预后有一定差别，又不得不“鉴别”。想问一个问题，普通导管增生和不典型导管增生，可以同时出现在同一病灶里面吗？

考虑UDH

不能跟着老大走,人家树大招风

 I favor ADH.  Cytologic atypia can be appreciated in the last 3 pictures.  Uniform cytology is actually a worrisome sign for atypia in low grade lesion because normal ductal cells and UDH have cellular variation.

The last picture has micopapillary architecture.  If you see more of these in other areas, you should think of micropapillary type DCIS.  When you see UDH and ADH in one focus, call it ADH. 

 高举伟大旗帜  永远跟着党（老大）走

谢谢minfuyu老师的讲解。