FOLH1 and metastatic malignant neoplasm in the lymph nodes: PET/CT acquisition 1-h, 24-h, and 48-h post-injection of a median (minimum-maximum) [<sup>89</sup>Zr]Zr-PSMA-617 tracer activity of 123 (84-166) MBq.<h4>Results</h4>[<sup>89</sup>Zr]Zr-PSMA-617 PET/CT detected altogether 57 lesions: 18 local recurrences, 33 lymph node metastases, 6 bone metastases in 30/38 men with BCR (78%) and prior negative conventional PSMA PET/CT.