@mossa my cancer was 95% estrogen positive and 85% progesterone positive but the Breast Cancer Index still told me there was no benefit to extending treatment past 5 years. I had to get the paperwork for the test myself but most doctors will do it if they see it in the NCCN guidelines. The Oncotype showed risk reduced 50% but BCI was the only thing I could rely on at the 5 year point.