We observed that [89Zr]Zr-PSMA-617 PET/CT at ≥ 24 h post-injection frequently revealed lesions suspicious for prostate cancer that had been missed on ~ 1-h [68Ga]Ga-PSMA-11 PET/CT images [17, 19, 22]. Here, FOLH1 is linked to Familial prostate cancer.