Hi a Chook. I had a WLE in January 2012, went through chemo and radio, finishing in September, 2 months later in November my breast felt tender and had swelled up, 10 months after surgery. Like you I had too have an ultra sound and was advised it was fluid build up but caused by radiotherapy (you don't say if you had radio?). Nobody is remotely concerned about it, my oncologist says it may or may not go down, 2 years on and it's still the same. Hope this is reassuring for you. Take care
CC x
