Biopsy: An overwhelming majority of cases of dcis are diagnosed in women who have an abnormality seen on mammography in the absence of any palpable lumps. It is believed that the significant increase in dcis over the past 20 years is due to the increased mammography screening over this time period.
Answered 10/4/2011
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Cannot: Lcis and dcis are both conditions are variants of changes in the breast that can only be determined by biopsy.
Answered 8/23/2013
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