I am a 30 year survivor of hormone receptor negative invasive ductal carcinoma.
My decisions on treatment was similar to @sybille
I was 48 and had young children. I also had a second opinion at Sloan- Kettering- with the top expert in those days.
I did not want chemo, but I knew I had to- not only for myself, but for my children. I didn’t want them to have to say that mom should have done more.
I also had mastectomy.
Chemo was very tough on me, but I got all treatments on time and at full dosage. Apparently, this was also important.