External Validation of Nomograms for Predicting Pelvic Lymph Node Metastases in Patients with Prostate Cancer and the Added Value of the Prostate-specific Membrane Antigen Positron Emission Tomography–based PRIMARY Score

We looked at how well different tools predict whether patients with prostate cancer are likely to have metastasis in their pelvic lymph nodes. We found that combining a tool called the Amsterdam-Brisbane-Sydney nomogram with a score for PET (positron emission tomography) scans called the PRIMARY score gave the best prediction performance. This combined tool could help in planning the extent of surgery for patients with intermediate-risk or high-risk prostate cancer if our results are confirmed in other studies.