It s been over a year that I have had a lump in my armpit. It seems to get bigger and tender right before I start my period. When my boobs are tender it is tender and as my boob tenderness goes away so does the tenderness in the armpit. The lump never goes away. I went and had an ultrasound of the armpit but it came back normal. I went back to my pcp and told her that I can t just ignore it and we need to figure this out. She has scheduled a mammogram for me. I am a camcer survivor of osteosarcoma and was persistent when I discovered the lump so I do not want to just ignore this lump. My pcp seems like she has no clue what it could be and wants me to go to the breast center. Any idea what this could be?!