Thank you I had a look through it - I also asked my oncologist and she said it’s not needed for DCIS as it’s local breast cancer and Natera is for metastatic breast cancer. I’ll share what new info I get at my next check up with her. From all the research I can find so far on DCIS ER/PR negative with double mastectomy there is no recommendation that exists for screening post operation. If anyone does find anything would be grateful to be shared. What’s hard I think for me is if DCIS came back say in the skin how would I ever know?! I pray that this won’t ever happen but I got caught out once with this beast cancer hidding deep in my breast I won’t let it do that again.