In MRI, the mean tumor volumes of PSMA-positive and PSMA-negative tumors were not significantly different (p = 0.06) with LNCaP C4-2 (32.4 ± 7.8 mm3), LNCaP (29.4 ± 0.1 mm3), and PC-3 (30.0 ± 2.3 mm3). This evidence concerns the gene FOLH1 and neoplasm.