Hormones (Athens, Greece) · 2020
Detection of thyroiditis on PET/CT imaging: a systematic review.
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Albano Domenico, Treglia Giorgio, Giovanella Luca, Giubbini Raffaele, Bertagna Francesco
Аннотация
PURPOSE: The incidence and clinical significance of thyroiditis detected by molecular imaging methods is a clinical challenge that is not widely investigated in the literature. The aim of this systematic review was to analyze published data about the detection of thyroiditis on PET or PET/CT using different tracers.
METHODS: A comprehensive computer literature search of the Scopus, PubMed/MEDLINE, Embase, and Cochrane library databases was conducted up to November 2019 to find relevant papers on the detection of thyroiditis by PET/CT, the metabolic appearance, and the clinical significance.
RESULTS: Twenty-six articles were selected and retrieved in full-text version. From the analyses of these studies, the following main findings have been found. Diffuse thyroid uptake of PET tracers is a relatively frequent event, ranging from 0.4 to 46.2%, and it is commonly related to benign disease. Thyroiditis is the most frequent reason for diffuse increased thyroid 18F-FDG uptake. Cases of malignant disease with a pattern of diffuse 18F-FDG thyroid uptake are less frequent. Preliminary studies show a possible role of thyroiditis detected by 18F-FDG PET/CT in evaluating treatment response and as a prognostic marker in oncological patients treated with immunotherapy. However, further studies are needed.
CONCLUSIONS: Diffuse 18F-FDG thyroid uptake is a relatively rare event commonly due to benign diseases, among which thyroiditis is the most common. The rate of neoplastic disease with diffuse 18F-FDG thyroid uptake is very low. Diffuse 18F-FDG thyroid uptake requires further investigation and clinical evaluation for the correct diagnosis. Currently, cases of diffuse thyroid uptake with non-18F-FDG radiotracer are only anecdotal.
METHODS: A comprehensive computer literature search of the Scopus, PubMed/MEDLINE, Embase, and Cochrane library databases was conducted up to November 2019 to find relevant papers on the detection of thyroiditis by PET/CT, the metabolic appearance, and the clinical significance.
RESULTS: Twenty-six articles were selected and retrieved in full-text version. From the analyses of these studies, the following main findings have been found. Diffuse thyroid uptake of PET tracers is a relatively frequent event, ranging from 0.4 to 46.2%, and it is commonly related to benign disease. Thyroiditis is the most frequent reason for diffuse increased thyroid 18F-FDG uptake. Cases of malignant disease with a pattern of diffuse 18F-FDG thyroid uptake are less frequent. Preliminary studies show a possible role of thyroiditis detected by 18F-FDG PET/CT in evaluating treatment response and as a prognostic marker in oncological patients treated with immunotherapy. However, further studies are needed.
CONCLUSIONS: Diffuse 18F-FDG thyroid uptake is a relatively rare event commonly due to benign diseases, among which thyroiditis is the most common. The rate of neoplastic disease with diffuse 18F-FDG thyroid uptake is very low. Diffuse 18F-FDG thyroid uptake requires further investigation and clinical evaluation for the correct diagnosis. Currently, cases of diffuse thyroid uptake with non-18F-FDG radiotracer are only anecdotal.