Hi Jill, My husband was 56,000! when he was first diagnosed nearly 15 months ago, with kidney failure, he was very ill, however had no symptoms until 1 month before he was diagnosed,,hes had a stem cell transplant, it was very difficult after the stem cell transplant, which went extreamly well he has been back on chemo, and still have light chains around the 175, mark, this is the lowest hes ever been,as long as your mum is being treated and monitored try not to worry , the point Im trying to get over is that everyone is so different,and different people seem to be able to tolerate differnt levels,the health professionals will have it in hand, for your information we used the Royal Marsden and I cant thank them enough.Good Luck your mum will not want you to worry any questions you need to ask, ask your mums consaltant and perhaps they can explain the plan they have for her treatment, xx