Oncotype Scores - how do they determine the score?
Looking for a bit of guidance. I had a BMX with SNB following DCIS 7cm diagnosis intermediate grade strongly ER positive.
The three nodes came back negative (yay!) for any invasive cancer following the SNB biopsy but they found 5mm of IDC (stage 2) post the surgery.
The IDC is ER/PR positive and HER negative so my PS has ruled out radiation. The next step is to do the Oncetype test to determine the recurrence score and if chemotherapy is recommended or if hormone therapy is enough. I have been told that the likelihood is that my score will be low based on my factors.
I was hoping to understand what determines the test. I know they measure 21 genes but hard to get any other information beyond this.
Is ER positive a good thing? What are the typical scores that are seen with IDC 3mm ER/PR pos and HR negative?
Thank you in advance for responses and wishing everyone the best and especially if you are waiting for results which is the worst part of this journey! :-)