PMC6159111_01
Non-contrast axial CT image showing an aneurysm with erosion of the anterior vertebral body and a soft tissue collection posterior to the aneurysm between the psoas muscle and the spine (arrow).
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Later, CT chest, abdomen and pelvis showed soft tissue posterior to the aneurysm as well as periaortic inflammatory process, no malignancy was found (Figure 1).
Axial T2 scan showing erosion of anterior L4 vertebra and extending collection in the form a small abscess over the right paravertebral region within the right psoas muscle (arrow).
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 An MRI (lumbar spine) showed a small abscess collection over the right paravertebral region (Figure 2).
FDG-PET scan showing L4/5 disc destruction and intense FDG uptake within the disc with increased activity in the area of extension to the right psoas muscle (arrow). FDG, fludeoxyglucose.
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Moreover, an FDG-PET scan of lumbar spine showed an increased uptake in L4/5 disc with continuity to the right psoas muscle (Figure 3).