Is it ‘have’ or ‘had’ breast cancer?

Im newly diagnosed and waiting on the results of an MRI before my surgeon finalises my plan going forward. As it stands now, I’ll be having a lumpectomy, followed by radiotherapy and then hormone therapy.

My question is a bit out of the box and was hoping for some insight.

After having surgery, and hopefully the surgeon is confident that margins are clear and lymph nodes are clear, do I then refer to having ‘had’ breast cancer or do I still ‘have’ breast cancer?

So basically, when do I transition from  ‘present tense’ to ‘past tense’?

I know this question is a bit out there but I’m just wondering how do I describe my condition after a hopefully successful surgery.