A couple of weeks ago, my mum was diagnosed with pre cancerous cells in the breast. We were obviously relieved as it was not cancer. She had it operated on today and was told she has to go back in 3 weeks to get the results. I'm a bit confused by this, cause maybe naively, I thought she'd have the operation and that would be the end of it... now I'm wondering what are they testing for?? I thought it was pre cancerous cells and that was the end of it and now I'm worrying that it might be something more after all? Don't know if I'm worrying unnecessarily?