Ductal comedocarcinoma, a type of ductal carcinoma in situ (DCIS), consists of DCIS and areas of necrotic (degenerating) cancer cells. Compared to DCIS without necrosis, ductal comedocarcinoma is more aggressive.
DCIS is the most common form of non-invasive, early-stage breast cancer. Typically, DCIS is suspected when microcalcifications (tiny deposits of calcium) are observed on mammograms.
DCIS occurs when cancer cells have filled the breast ducts, but have not spread to the surrounding fatty or connective tissue of the breast or to any other part of the body.
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