Both the core technique and the vacuum assisted device are useful in determining whether a cancer is limited to the ducts (non-invasive or in-situ) vs. invasive or infiltrating cancer (infiltrating beyond the ducts.) This cannot be determined using the fine needle or skinny needle technique.

breast duct without cancer

 and breast duct with cancer limited to the duct or non-invasive duct cancer or ductal cancer-in-situ or intraductal cancer.

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