FOLH1 and prostate cancer: The inclusion criteria were as follows: studies (I) that used The inclusion criteria were as follows: studies (I) that used 68Ga-PSMA PET/CT for diagnosing primary prostate cancer; (II) that used histopathological examination as reference standard for comparison; (III) in which prostate cancer was confirmed by biopsy or postoperative histopathological examination; (IV that included true positive, false positive, true negative, and false negative data to construct a 2x2 quadrilateral contingency table; (V) with at least 10 patients; and (VI) that were originally published.