Overview of F18-FDG uptake patterns in retroperitoneal pathologies: imaging findings, pitfalls, and artifacts

ConclusionRetroperitoneal pathologies can be complex, ranging from oncologic to a spectrum of non-oncologic disorders. While crosse-sectional imaging (CT and MRI) are often the initial imaging modalities to localize and characterize pathologies, metabolic information provided by F18-FDG PET/CT can change the management and clinical outcome in many cases.Graphical abstract(a) Brown fat activation on F18-FDG PET. Axial fused PET image of the abdomen shows hypermetabolic foci in the bilateral perinephric fat (arrows). (b) Adrenal metastasis in a 78-year-old woman with serous ovarian carcinoma. Axial fused PET/CT of the abdomen shows intense uptake in the new left adrenal lesion (arrow), with FDG uptake intensity markedly higher than the liver. (c)Axial contrast-enhanced CT abdomen shows the lobulated mildly enhancing left adrenal metastasis (circle).
Source: Abdominal Imaging - Category: Radiology Source Type: research