New Horizons in Radioligand Therapy: 161Tb-PSMA-617 in Advanced mCRPC.

Rosar, Florian; Maus, Stephan; Schaefer-Schuler, Andrea; Burgard, Caroline; Khreish, Fadi; Ezziddin, Samer · Clin Nucl Med · 2023

case_report · Level V

Where this comes from

Abstract

An 85-year-old man with advanced metastatic castration-resistant prostate cancer and progression after 8 cycles of 177 Lu-prostate-specific membrane antigen (PSMA)-617 radioligand therapy (RLT) received 1 cycle of 161 Tb-PSMA RLT. This one administration of 6.5 GBq 161 Tb-PSMA-617 resulted in impressive partial remission with a PSA decline by 53.4% (from 474 to 221 ng/mL) and a concomitant decrease in tumor burden on PSMA PET/CT imaging. The presented case provides stunning initial evidence of the therapeutic potential of 161 Tb-PSMA RLT in metastatic castration-resistant prostate cancer, even in patients progressing after extensive 177 Lu-based RLT. 161 Tb-labeled PSMA ligands may thus offer a promising alternative to standard PSMA RLT.

Medical subject headings