I had a clip left after biopsy 1+yr ago. Now I have intermittent sharp, burning pain in that spot. It comes and goes and it is sometimes VERY painful. I can't go without a bra anymore and any movement of the breast brings on the pain. I'm going to check this out as I see others w the same problem. Perhaps "we" shouldn't have these things, expecially now that I see they don't always "stay put". Migration defeats the purpose of the clip and the pain is at times, disabling.
They're reference markers and are designed to remain in place... no matter what.