Hi there, I had grade 3 Ductal cancer with micro vascular invasion , diagnosed September 2021. 
I had a 23 mm tumour which turned out to be ER positive. For this diagnosis I had a lumpectomy in November which lead to a sample being sent for the oncotype test which looks at the make up of the tumour and identifies if chemo is beneficial for the type. 
I started chemo in January finishing in May and the I had one week of radiotherapy in June. I am now on letrozole for 5 years which in a way suppresses the production of eostrogen as this was the hormone that was feeding my tumour.

This treatment was specific to my tumour type so I'm sure things will become clearer when you speak to the consultant again. I know it's difficult to not look for similar experiences as I did exactly what you have done but sometimes this causes more worry so I would try to wait and see what is the plan for your wife which will be specific to her diagnosis.  I didnt find anyone that had been diagnosed with exactly what I had so I think I just worried more because I thought it must be rare but I am out the other side now and doing really well.

best wishes xxx