Hope it helps. I had a lot of help decoding the science and research studies when I faced a decision last year as a science-trained friend worked meticulously to sort it all out for his wife the year before when a routine mammo and ultrasound found a Stage 1 breast cancer tumor resting near her chest wall.

She had a lumpectomy, very low OncotypeDX probability of recurrence, and clean sentinel lymph nodes so faced the same decision tree. I benefitted from their intense research and analysis.