Do you recommend continued PCR testing in a CML patient who underwent allogeneic stem cell transplantation with an identical match about 20 years ago? 

If the patient was transplanted in chronic phase and has not experienced relapse post alloSCT nor h/o BCR-ABL1 Q-PCR/FISH positivity post alloSCT, I do not believe that there is much value for continuous PCR testing 20 years later as the vast majority of the relapses occur the 1st few years post all...