Hi Daisy,
I was 61 when I was diagnosed. 63 now, so the same age as your mum. I had an ultra sound of the lump I found back in november 2012. They also biopsied it, and a suspicious looking lymph node they saw on the US. Only one lymph node had cancer in it, that (and two others that were clear) were removed when I had my mastectomy. The fact that there was only one node affected was good, it just meant the node was doing its job and soaking up residue from the tumour. I've had chemo and am now on Anastrazole for at least 5 years, and no sign of any cancer at the moment. So It isn't necessarily anything to worry about if there is some cancer in one or two nodes. Sending you both hugs and hoping your mum's results will be better than expected.
poemsgalore xx