Countrybumpkin, your GP & the other ladies are right - a painful lump is more likely to be a cyst than anything more serious. Like some of the other ladies who replied, I've had many over the years. Had several mammograms before screening age, ultrasound, some specialist scanning I forget the name of (which showed multiple cysts present at the same time), fine needle aspiration (tiny biopsy) and even a lumpectomy - all turned out to be benign. Only natural to worry (& like you, sadly my Mum died of breast cancer, so I know how this ramps us the anxiety even more), but being fast-tracked for screening is the best thing that can happen to us in this situation. I think your lump is very likely to be benign, but even if it were not, early treatment means a good outcome is much more likely. I know you will know all this already, but a little solidarity from other ladies who have been there will hopefully help you feel less alone and a little more reassured. I hope your appointment comes around quickly - do tell the mammographer about your back problems so that she can make it as comfortable as possible for you. Wishing for a very good outcome & sooner rather than later.