is there a mathematical model that is used to estimate trajectory of PSA rise? Certainly doubling rate is a consideration easy enough to calculate, but at what point do these rates become non-linear?
My last 3-yrs on Keytruda have been great - life pretty much back to normal. Yr 1undetectable PSA; Yr 2-3 slow creep from 0 to 1
I’m starting Yr 4 and trying to estimate how long I have before this reaches ~10 and then 20 at that point lutetium is the next (last?) recommended arrow in the quiver.
How much longer can I expect to ride the Keytruda Train?