FOLH1 and posterior cortical atrophy: With a time interval of 3 days, the patient underwent both [18F]FDG with only minimal prostatic uptake and [68Ga]Ga-DOTA-FAPi-04 PET/CT examinations, which detected non-PSMA/FDG-slightly avid primary PCa, which was later confirmed by a biopsy (Gleason score, 4 + 5, ISUP 5).