I have been on 3-monthly checkups since January 2024. My blood tests showed the cancer markers at 9, then 15, then 29 and now 67 in October. I will be having another CT Scan before I see the oncologist again on 19 November. I had a CT when the markers doubled to 29 and it was all clear. For the first 6 months I was having niggly pains now and again. Prior to this appointment, in October, I had no pains in the previous 3 months.  The pains are starting again. Does anybody know at what level you start further treatment, I forgot to ask. I have been feeling fine but still get tired especially in the evening.