The sensitivity of 18F-rhPSMA-7.3 PET/CT for detecting lymph node metastasis was found to be low, ranging from 23% to 30% among the three readers, but increased to 38% and to 52% for ISUP grade 5 cancer, likely due to higher PSMA expression in higher-grade tumors [37]. Here, FOLH1 is linked to metastatic malignant neoplasm in the lymph nodes.