I had a single mast. with 6 sentinel lymph nodes removed a month ago. Within a week I noticed that my abdomen seemed to be getting larger on same side as the surgery. I asked the surgeon 2 or 3 times over the next few weeks about it. She didn't pay much attention. I went to breast reconstructive surgeon for consult and he immediately said I have lymphedema, just in beginning stages. I was given a referral to Lymphedema specialist. I have not seen her yet but spoke on phone. She said fluid from the surgery to the abdomen is very common. Whether it's caused by lymphedema, I'll find out next week. If anyone is interested, I will post what I find out. I'm already doing lots of research. I also was not given any information on this possible complication from the surgeon.