Incidental diagnosis of thrombus within an aneurysm on 18F-FDG PET/CT: frequency in 926 patients.
retrospective_cohort · Level III
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- Record sourced from PubMed, PMID 21816969.
- Also identified by DOI 10.2967/jnumed.111.091264.
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Abstract
Our objective was to evaluate the incidence of aneurysm and the frequency of thrombus within an aneurysm on unenhanced (18)F-FDG PET/CT studies. We reviewed 1,540 PET/CT scans from 926 patients. A log recorded whether each case of aneurysm had a suspected thrombus. The maximal standardized uptake value of the patent vessel was compared with the thrombus. Findings were confirmed using all available follow-up data. Aneurysm was found incidentally in 16 (1.7%) of the 926 patients, with 15 occurring in the abdominal aorta and 1 in the internal jugular vein. Seven of these 16 patients had shown suggestions of thrombus on unenhanced PET/CT, and in all 7, thrombi were confirmed on contrast-enhanced CT. In 1.7% of patients, aneurysm was found incidentally on PET/CT, and thrombus was present in 44% of these cases.
Medical subject headings
- Aortic Aneurysm, Abdominal
- Thrombosis