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As the other ladies suggested, this is a very personal decision, and I'm sure your doctor will advise you accordingly. That being said, DCIS is contained in the milk duct, and although it can become invasive, it is not invasive at this point. Possibly your medical team might want you (or YOU might want you) to get the BRCA test to determine if you have a mutated gene that would likely lead to an invasive carcinoma in the future. Another factor to consider is whether you have a family history of bc, and of course, how you personally feel about about having a lumpectomy vs. a mastectomy. As someone else said, there are many variables to consider, and these are a few you may wish to discuss with your team as you work through making this decision. Hope that helps.
Hugs & prayers,