Hello @cmdw2600 ,
I have ER/PR+, HER2 negative BC on my left side. I had felt some lumps on my right side a few months after my diagnosis. One was quite visible. They felt round, mobile, bit tender. My surgeon did an exam and then a needle aspiration. They turned out to be fluid filled, benign cysts. Once drained, I cannot feel them anymore. I kind of feel bad that she did it without doing any imaging. (They did a mammogram afterwards and verified no BC).