Free TcO4- in 99mTc-PSMA Scan: A Case Report and Review of an Old Pitfall in the New Era of Modern Imaging

Clin Nucl Med. 2024 Apr 30. doi: 10.1097/RLU.0000000000005240. Online ahead of print.ABSTRACTIn a recent 99mTc-HYNIC-PSMA study conducted at our department, we examined 2 patients with prostate cancer referred for initial staging on the same day. The whole-body scans revealed radiotracer uptake in the gastric mucosa and thyroid glands, alluding to high levels of free TcO4- in the injected vial. The scans were repeated after confirming acceptable radiopharmaceutical purity of 97% (normal range, 95%-100%). Interestingly, 1 patient had liver metastases at presentation, which remained non-PSMA-avid after repeating the scan. We have reviewed this pitfall, which has been reported with many radiotracers, yet not reported with PSMA tracers.PMID:38687008 | DOI:10.1097/RLU.0000000000005240
Source: Clinical Prostate Cancer - Category: Cancer & Oncology Authors: Source Type: research