There were 4 'visible' pelvic lesions by PSMA PETCT scans. Keep in mind the term oligometastsis. If less than 5 'mets' MAY allow the use of spot radiotherapy. (Stereotactic Beam RadioTherapy: SBRT) It may be more useful for 'mets' in other areas, such as bone. Medicine is an artfully application of science add to that fact is that there are several disciplines with differing training, and clinical experience, etc., ( surgeons (US), Physicians (MO), Radiation (RT) & occasionally interventional radiologists, and nuclear medicine docs.) Unseen in this mix are venal incentives which can becloud the clinical issues. I have even heard the expression, "... If you were my brother...." Have an advocate without a dog in the fight.

Listen to @jeffmarc. BTW in re: to his pre and post scan picture, the right image showed 4 areas in the neck that lit up after successful drug treatment. They are normal PSMA producing tissues, so not to worry there.