FOLH1 and metastatic malignant neoplasm in the lymph nodes: There are indications that such a benefit can be documented; in a recent study by van Leeuwen et al. [25], the biochemical recurrence rate after radical prostatectomy was 17% among patients who had no signs of lymph node metastasis on the PSMA PET/CT compared to 50% of those in whom PSMA identified lymph node involvement.