\ufeffPSMA-ligand PET allows a more accurate therapeutic response evaluation of bone metastases in prostate cancer compared to computed tomography.

Abstract

A patient with bone metastases of prostate cancer was referred for 68Ga-PSMA-11 PET/CT. Compared to a 68Ga-PSMA-11 PET/CT four months previously, the CT-component of the current PET/CT showed morphological progress in all lesions despite continuous therapy with docetaxel and denosumab. Contrarily, the PET-component showed a reduction of tracer-uptake, which correlated with PSA decrease between the two PET/CT-scans (16.2\u2009ng/ml vs. 3.1\u2009ng/ml). This case highlights 68Ga-PSMA-11 PET/CT as a promising tool for therapy monitoring of prostate cancer and could serve as a basis for a novel monitoring strategy. Volume progress shown by CT must not be classified as tumor progress, but as bone remodeling following effective therapy.