Clinical Report: FDG-PET/CT Uncovers the Source of Fever in a Clinical Case

Background

Fever of unknown origin (FUO) presents a diagnostic challenge in clinical practice, often requiring advanced imaging techniques for identification of underlying causes. FDG-PET/CT has emerged as a valuable tool in such cases, particularly in detecting inflammatory conditions like polyarteritis nodosa.

Data Highlights

No numerical data or trial data presented in the article.

Key Findings

• A 56-year-old man presented with fever, myalgia, and negative cultures despite antibiotic treatment.
• Whole-body ^18F-FDG PET/CT demonstrated bilateral irregular uptake suggestive of polyarteritis nodosa.
• Intermediate-dose prednisone and azathioprine were administered, leading to clinical and biochemical improvement.
• The PET pattern described as 'ant-farm-like' may represent a proposed phenotype of PAN with high inflammatory burden.
• Quadriceps biopsy showed no vasculitis, indicating the need for careful biopsy planning based on PET findings.

Clinical Implications

FDG-PET/CT can be instrumental in diagnosing conditions like polyarteritis nodosa in patients with FUO.

Conclusion

This case illustrates the role of FDG-PET/CT in uncovering the source of fever in complex clinical scenarios.

Related Resources & Content

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4. Journal of Gastroenterology, 2013 -- Utilization of 18F-fluorodeoxyglucose PET Imaging for Post-Treatment Evaluation of Malignant Liver Tumors
5. The Contribution of 18F FDG PET-CT for the Investigation of Fever of Unknown Origin and Inflammation of Unknown Origin, 2024
6. Clinical and Laboratory Diagnosis for Q Fever | Q Fever | CDC
7. https://findresearcher.sdu.dk/ws/portalfiles/portal/265741032/s00259-024-06732-8.pdf
8. The Contribution of 18F FDG PET-CT for the Investigation of Fever of Unknown Origin and Inflammation of Unknown Origin - ScienceDirect