I can't understand what makes cancer return even when people use brachytherapy and combine it with external beam radiation.
The external beam for the pelvis area should take care of micro-mets, no?
Let's assume person does PSMA/PET scan, maybe even PSMA/PET combined with nano-MRI which is latest discovery in terms of MRI as of 2021.
If that is the case, why are there still cases where cancer returns?
How does it form and what are the exact causes that make it return?
M59, Gleason4+3, PSA7.8, T2C.