I had the OncotypeDX for a Stage 1A tumor with a clean sentinel lymph node biopsy. Allowing the sentinel lymph node biopsy (which I was first disinclined to have), and the OncotypeDX, were the two best decisions I made when first faced with a bad mammogram, ultrasound and vacuum-assisted-wide-needle biopsy that showed cancer.

Those two tests were reassuring about likely recurrence risk, as were some of the online algorithms and consults with a few oncologists, and were the foundation upon which I made subsequent decisions. So I encourage anyone dealing with breast cancer to explore any tests that might provide useful data. None of this stuff is perfect but if all the data combined helps provide a defensible picture of the overall whole situation, as mine did, it helps a lot. And any statistical outliers can trigger further evaluation of a prognosis or treatment plan and that's also valuable.