They have offered her a lumpectomy (so I aimed at the positive by saying that they thought she was well enough for surgery.)
However she will need to be on hormone treatment whichever she decides ... so she has opted to go on the hormone treatment and be re-assessed in three months. If it has not grown, then that is what she will continue with. I pray that the lump will decrease in size over the next year.
She actually has the advantage of her age (86) in that the tumour is slow growing.
On a side fact we were told that 1 in 6 ladies will have some form of breast cancer in their lifetime ... that is a scary modern fact.