FOLH1 and prostate neoplasm: We observed statistically significant correlations for prostate tumor SUVpeak with immunohistochemical staining and digital quantitation for PSMA (r = 0.737, P = 0.004), HOXB13 (r = 0.702, P = 0.007), and AR (r = 0.659, P = 0.014) in the prostate lesions (Fig. 5C) or SUVmax with immunohistochemical staining and digital quantitation for PSMA (r = 0.806, P = 0.001), HOXB13 (r = 0.697, P = 0.008), and AR (r = 0.743, P = 0.003) in the prostate lesions (Fig. 5D; Supplemental Table 5).