Lani has posted many, many very interesting pieces of information about DCIS in the Articles forum that you might find helpful if you try a search using DCIS there.
Although the link I will post is a March, 2004 one it also provides some perspective about assumptions about any consensus regarding treatment of DCIS:
http://www.oncolink.upenn.edu/resour...h=03&year=2004
Treatment choices are always very individual. I would recommend getting several professional opinions, especially if possible from an institution at the forefront with HER2 research. In general I agree with Hopeful's suggestions.
Knowledge and beliefs regarding the superiority and efficacy of chemotherapy for HER2's are changing at many levels, even though actual change in collective thought and action can take much longer.
AlaskaAngel