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Chronic sciatica is a major cause of disability worldwide, but accurate diagnosis of the offending pathology remains challenging. In this report, the feasibility of a fluorodeoxyglucose (18F-FDG) positron emission tomography/magnetic resonance imaging (PET/MRI) approach for improved diagnosis of chronic sciatica is presented. Methods:18F-FDG PET/MRI was performed on 9 chronic sciatica patients and 5 healthy volunteers. Region-of-interest analysis using maximum standardized uptake values (SUVmax) was performed, and 18F-FDG uptake in lesions was compared with the corresponding areas in healthy controls. Results: Significantly increased 18F-FDG uptake was observed in detected lesions of all patients, which was correlated with pain symptoms. 18F-FDG-avid lesions were not only found in impinged spinal nerves, but were also associated with non-spinal causes, such as a facet joint degeneration, pars defect, or a presumed scar neuroma. Conclusion: The feasibility of 18F-FDG PET/MRI for diagnosing pain generators in chronic sciatica has been demonstrated, revealing various possible etiologies.
View details for PubMedID 29097408