I did not have a mastectomy with DCIS because my cancer was only 1.1 cm and I had no lymph node involvement and I had clean margins meaning the cancer was removed with surgery. I had a choice whether to have a mastectomy with chemo or lumpectomy with chemo and radiation. For me, keeping my breast was important and my surgeon encouraged me to go that route also. Although scarred I am extremely happy with my decision. At first it was difficult to look at, but one year later i am very content with the outcome. With cancer there are always choices with treatment and everyone is individual in what treatment/surgery they may choose.