I was diagnosed with fibro. cysts. I have already had two surgery's for solid cysts. Last week I found a lump larger than a ping pong ball. My breast Dr. said it was a cluster. The lump doesn't hurt but my right arm and should and my back, in back of where the lump is hurts. It is hard to use my right arm. I go in for a mam and untra sound thursday. I will find out the results next monday. In the meanwhile my brain is going places that I know better to let it.