not a teacher
There are some parts of your post that are not clear. However, because this might be urgent I will try to help you.
I am not sure what you mean by "mdanderson", but perhaps you mean Dr Anderson MD.
If so, then here is what I think you are trying to say.
Mrs Koren has received treatment from Dr Anderson. She has been accepted for a clinical trial as a patient with stage four ovarian cancer.
Or perhaps Mrs Koren does not have stage four cancer for sure, but is only having a clinical trial.
Mrs Koren has received treatment from Dr Anderson. She has been accepted as a patient for a clinical trial for stage four ovarian cancer.
Let us know if you think this is not what you want to say.