Fatema, I would expect ‘stationary’ to be good, but I would discuss the meaning of that terminology with the radiologist. I think dormant, stable and stationary are used interchangeably, but I would prefer clarification from the radiologist. No need to guess here.
My take on the number of cycles is that three may be too soon to see a material change, if there is going to be one. Again, your mom’s onc can probably give you a better read here too.
I play ‘stupid’ with my doctors and ask lots of questions (and keep a careful journal so I don’t repeat the questions … these things [cc] are journeys rather than events). Mine is now over three years and counting.
Wishing you the best in getting the very best care for your mother.