Hi Melzzs
Lots of info to understand...
Generally DCIS is diagnosed with
ER hormone positive or negative/ and Progesterone positive /negative receptors which means that the treatment is usually to reduce the hormone positive by giving tablet Therapy such as Leterzolefor 5+ years
Generally Dcis does not have a Her2 status and is said to be stage 0
..unlike like other breast cancers stages 1 to 4
More details need to be given by treatment specialist for your different result as its is Er negative
so nxt appointment the therapy treatment will be discussed.
Good luck with follow up