Diagnosis of abdominal aortic prosthesis infection with FDG-PET/CT
Hans Balink1, Michel M P J Reijnen
1Department of Nuclear Medicine, Medical Centre Leeuwarden, Leeuwarden, The Netherlands. hans.balink@znb.nl
Abstract:
A 79-year-old man was referred with recurrent periods of fever and chills. Six years earlier an aortic bifurcation graft had been implanted. Blood examination showed elevated infection parameters. A regular computed tomographic (CT) scan in the previous hospital showed no signs of graft infection. When blood cultures revealed multiple enteric bacteria, a 2-deoxy-2-[F18]fluoro- d-glucose-positron emission tomographic/CT (FDG- PET/CT) scan was performed that demonstrated ring-shaped pathological uptake at the proximal anastomosis. The patient was operated on and an infected graft was found, with a 1-cm defect in the distal part of the duodenum. Bacterial cultures of the explanted graft were positive. The patient recovered well from surgery and is on a regimen of prolonged antibiotic and antimycotic treatment.
Insights
Aortic graft infection was diagnosed in a 79-year-old man using 2-deoxy-2-[F18]fluoro-d-glucose-positron emission tomographic/CT (FDG-PET/CT). This advanced imaging identified infection missed by standard CT, enabling timely surgical intervention and recovery.
Area of Science:
- Vascular Surgery
- Infectious Diseases
- Nuclear Medicine
Background:
- A 79-year-old male presented with recurrent fever and chills six years post-aortic bifurcation graft implantation.
- Initial investigations revealed elevated infection parameters, but conventional computed tomographic (CT) scans did not indicate graft infection.
Observation:
- Blood cultures identified multiple enteric bacteria, prompting further investigation.
- A 2-deoxy-2-[F18]fluoro-d-glucose-positron emission tomographic/CT (FDG-PET/CT) scan was performed.
- The FDG-PET/CT scan revealed characteristic ring-shaped pathological uptake at the proximal anastomosis site.
Findings:
- Surgical exploration confirmed an infected aortic graft.
- A 1-cm defect was noted in the distal duodenum.
- Bacterial cultures from the explanted graft were positive for enteric bacteria.
Implications:
- FDG-PET/CT is a valuable tool for diagnosing prosthetic graft infections, particularly when conventional imaging is inconclusive.
- Early detection and surgical intervention are crucial for managing aortic graft infections.
- Successful treatment involved graft explantation, repair of duodenal defect, and prolonged antibiotic/antimycotic therapy.
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