Receiver-operating characteristic (ROC) curve analysis revealed that at when the SUVmax cutoff of PSMA-PET was 4.1, the sensitivity, specificity and accuracy for identifying lymph node metastasis were 88.4% (61/69), 97.9% (322/329) and 96.2% (383/398), respectively (Table 2). Here, FOLH1 is linked to metastatic malignant neoplasm in the lymph nodes.