Thrombosed aneurysm of the ductus diverticulum mimicking malignancy on 18F-FDG PET/CT

A 45-year-old woman with high-grade sarcoma of the right femur underwent 18 fluorine fluorodeoxyglucose positron emission tomography (18F-FDG PET/CT) for metastatic workup. The 18F-FDG PET/CT showed an FDG-avid soft-tissue mass in the aortopulmonary window ([figure 1][1]). Given the history of