Abstract
This paper is aimed to explore the clinical value of 18F-FDG PET-CT in searching for primary lesions of multiple metastatic malignances. Data of 35 patients with multiple metastatic malignances which the primary lesion was not clear, were retrospectively studied from January 2019 to April 2023 in our hospital. Systemic 18F-FDG PET-CT examination was performed for all the patients, and the follow-up data were analyzed and summarized. The positive rate of 18F-FDG PET-CT for primary malignant lesions was 74.29% (26/35), the specificity was 87.28%, the sensitivity was 85.43%, and the accuracy was 88.73%. The positive predictive value was 92.31% (24/26). 18F-FDG PET-CT showed a high detection rate of metastatic squamous cell carcinoma and metastatic adenocarcinoma, with 85.36% and 82.41% respectively. 18F-FDG PET-CT examination provides high clinical value in multiple searches of primary metastasis throughout the body.
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