I have Stage 4 mcrpc . I have been on ADH and Zytiga for 4 years with PSA of .06 for all 4 years. In Sept my PSA rose to .17 and 1 month later to .24 My oncologist said that I had biochemical reoccurrence. I had a PSMA pet scan but now realized that my PSA was probably to low to get a good scan is it was negative. Has anyone been here and if so what was your next treatment. My Dr has sent a blood sample to Guardant LAB. For a biopsy of the cancer cells and genetic testing. He said that Lu-177-PSMA-617. Any advice is so welcome.