It might move in relation to your chest wall, along with the rest of your breast tissue; but it shouldn't move from the tissue in which it's implanted. Tumors don't grow from fat, they grow from tissue; so when your breasts shrink they lose fat, but retain their same glandular and fibrous tissue. Thus the marker stays in place - where the radiologist put it, to makr the potential trouble spot. Hope this helps - PJH
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