I got referred and diagnosed with this after an ultrasound which showed nothing at all - the lump couldn't be seen - and then an examination. My lump is really quite tiny - about 2.5mm was what was on my notes - and I'm mid-20's so the breast clinic said they were confident it was fat necrosis and sent me on my way. I just hate that it's still there! Anyone else had any experience of this? When does it go?!