Re-Rechallenge 177 Lu-PSMA-617 Radioligand Therapy in Metastatic Castration-Resistant Prostate Cancer : A Step Further.

Aggarwal, Piyush; Gunasekaran, Vinisha; Sood, Ashwani; Kumar, Narendra; Rathore, Yogesh; Kumar, Rajender; Mittal, Bhagwant Rai · Clin Nucl Med · 2025

case_report · Level V

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Abstract

177 Lu-PSMA-617 radioligand therapy has been US Food and Drug Administration-approved safe and effective treatment modality for metastatic castration-resistant prostate cancer, usually administered in 4 to 6 cycles at 6 to 8 weeks apart. Many patients achieve partial response or stable disease with biochemical response after treatment. However, these effects are usually short-lived, and patients ultimately show disease progression after a median period of 6 to 9 months. Rechallenge therapy appears to be safe and effective treatment modality in such patients. We show the clinical efficacy and safety of re-rechallenge 177 Lu-PSMA radioligand therapy in a 64-year-old man with metastatic castration-resistant prostate cancer with disease progression on multiple lines of hormonal and chemotherapy treatment.

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