{"denoms":[{"counts":[{"groupId":"OG000","value":"0"}],"units":"Participants"}],"description":"68Ga-PSMA-11 positive lymph nodes will be considered for detection of extra-pelvic nodal metastases and assessed by change in size. Participants who if on follow-up imaging within 3-12 months, have lymph nodes which decrease by more than 30% or increase by more than 20% in short axis diameter (with a minimum of 3 mm in change in size) or with solitary lymph node regions show a decrease of PSA by \\>50% after targeted treatment and the lymph nodes do not change in size (less than 30% decrease or less than 20% increase in short axis diameter) will be counted as true positives. If on follow-up imaging, sites of initial 68Ga-PSMA-11 positive lymph node lesions \\< 30% without systemic therapy or focal therapy at this site or if 68Ga-PSMA-11 positive lymph node lesions that do not meet criteria for above false positive or true positive will be counted as false positives.","groups":[{"description":"PSMA PET imaging: Patients will receive Ga-68 labeled PSMA-11 PET and then undergo PET/CT or PET/MRI approximately 55-70 minutes later.\n\nGa-68 labeled PSMA-11 PET: Patients will be imaged using Ga-68 labeled PSMA-11 PET to determine if the presence of metastatic disease. Prostate Specific Membrane Antigen (PSMA) is a protein expressed on prostate cancer cells that can be imaged using small molecules that target this protocol.","id":"OG000","title":"Ga-68 Labeled PSMA-11 PET"}],"populationDescription":"Data on the detection of extra-pelvic nodal metastases was not collected","reportingStatus":"POSTED","timeFrame":"Up to 1 year","title":"Specificity of PSMA PET for the Detection of Extra-pelvic Nodal Metastases","type":"SECONDARY"}