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Usefulness of 18F-FDG PET/CT in a case of suspected vascular graft infection
R Fernández-López1, A de-Bonilla-Damiá1, I Acevedo-Báñez1
1UDIM, Servicio de Medicina Nuclear, Hospital Universitario Virgen del Rocío, Sevilla, España.
Abstract:
Vascular prosthetic graft infection (VPGI) is associated with high mortality and morbidity. An early and accurate diagnosis is essential in order to give the most appropriate treatment. The case is presented of a 74 year old male subjected to an aortobifemoral bypass graft, with clinical suspicion of VPGI with inconclusive tests. Later on an 18F-FDG PET/CT study showed a pathological uptake, suggestive of periprosthetic infection, as well as an incidental pulmonary lesion, suggestive of a primary neoplasm. A new 18F-FDG PET/CT showed a significant improvement in the uptake by the vascular graft after prolonged antibiotic treatment. 18F-FDG is a promising tracer for detecting VPGI as the accumulated activated white cells at the infection site have a high demand for 18F-FDG, and could help define the response to antibiotic treatment.
Insights
18F-FDG PET/CT aids in diagnosing vascular prosthetic graft infection (VPGI) and monitoring treatment response. This imaging technique shows promise for improving patient outcomes in complex cases.
Area of Science:
- Nuclear Medicine
- Radiology
- Infectious Disease
Background:
- Vascular prosthetic graft infection (VPGI) presents significant mortality and morbidity risks.
- Early and accurate diagnosis is crucial for effective treatment of VPGI.
Observation:
- A 74-year-old male with suspected VPGI after aortobifemoral bypass graft had inconclusive initial tests.
- 18F-FDG PET/CT revealed pathological uptake indicative of periprosthetic infection and an incidental pulmonary lesion.
- A follow-up 18F-FDG PET/CT demonstrated improved vascular graft uptake after antibiotic therapy.
Findings:
- 18F-FDG PET/CT effectively identified periprosthetic infection in a challenging VPGI case.
- The study highlights the utility of 18F-FDG uptake changes to assess treatment efficacy.
- Accumulation of activated white cells at infection sites drives high 18F-FDG demand.
Implications:
- 18F-FDG PET/CT is a valuable tool for diagnosing VPGI and evaluating therapeutic response.
- This imaging modality can guide clinical management and improve outcomes for patients with VPGI.
- Further research can explore the broader application of 18F-FDG PET/CT in managing prosthetic infections.
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