Fibrocystic breast disease is a benign condition . As long as your daughter gets regular breast checkups there is no need for her to consider radical surgery. The size of the cysts is hormonally related, so they are larger before her period and diminish after it's over. I have a relative in her seventies who has had the condition since she was in her late teens. She still has all her parts and still gets regular checkups just to make sure.