Similarly, suspected recurrent lymph node metastases were detected on MRI, PET, and PET/MRI in 3%, 8%, and 8% versus 12%, 30%, and 33% of patients with PSA levels < or > 0.5 ng/mL, respectively (Fig. 3B; Table 2). The gene discussed is KLK3; the disease is metastatic malignant neoplasm in the lymph nodes.