Hi. I just had a double mastecomy on August 8 2011. After surgeon took out breast tissue, Plastic Doctor put in expanders. I had 350 cc's of saline injected over 2 month period, I am scheduled for impants on Jan 4 2012. Just last week I notice a hard lump left on my strunum, it moves a little but not much. I called Plastics Doc and he advised me it probably was a fat globular cyst and he would remove it during the implant surgery. Coincidentally I had an apt with my Oncologist the next day and he made an appt for me to see my surgeon, which happends to be today. Any ideas of what it could be?