From the mamm/needle loc tech standing behind me:

Not everything shows up on US. MAKE SURE you follow the instructions for follow-up.

In six months, (this is the normal time period) they should do another mammogram to see if it has grown, is still there, is gone. If it has grown, they will (should) do a biopsy. Even if it is the same size at six months they may recommend a biopsy.

Also, make sure it is a good radiologist reading it. Ask your GYN. If you were seen at a Breast Center, you should be ok.

Scary- I know.

Nanci