PMC5798098_01
Case 1 - Maximum intensity projection image (a) showing linearly increased fluorodeoxyglucose uptake in mediastinum. coronal (b-d) and axial (e-g) sections of computed tomography, positron emission tomography and fused positron emission tomography-computed tomography images showing increased fluorodeoxyglucose uptake in aortic wall with maximum standardized uptake value: 11.3 (liver maximum standardized uptake value: 2.8)
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F1
Patient responded well and symptomatic improvement was seen after 3 months [Figure 1].
PMC5798098_02
Case 2 - Maximum intensity projection image (a) showing linearly increased fluorodeoxyglucose uptake in the mediastinum and left side of the chest wall. Coronal (b-g) and axial (h-j) sections of contrast-enhanced computed tomography, positron emission tomography and fused positron emission tomography-computed tomography images showing increased fluorodeoxyglucose uptake in aortic wall with maximum standardized uptake value: 4.3, right common carotid artery maximum standardized uptake value: 3.7 and arch of aorta maximum standardized uptake value: 2.6 (liver maximum standardized uptake value: 1.8)
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F2
Patient condition ameliorated symptomatically following treatment [Figure 2].
PMC5798098_03
Case 3 (pretreatment): Maximum intensity projection image (a) showing increased fluorodeoxyglucose uptake in mediastinum. Axial (b-d) and sagittal (e-g) sections of contrast-enhanced computed tomography, positron emission tomography and fused positron emission tomography-computed tomography images showing increased fluorodeoxyglucose uptake in aortic wall with maximum standardized uptake value: 11.1, and arch of aorta maximum standardized uptake value: 9.5 (liver maximum standardized uptake value: 2.8)
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F3
Transaxial images showed increased FDG uptake involving enlarged mediastinal lymph nodes, thickened walls of ascending aorta and arch of aorta and pericardial thickening with effusion [Figure 3].
Case 3 (posttreatment): Maximum intensity projection image (a), axial (b-d) and sagittal (e-g) sections of computed tomography, positron emission tomography and fused positron emission tomography-computed tomography images showing no evidence of abnormal fluorodeoxyglucose uptake in aortic wall with maximum standardized uptake value: 2.6 and arch of aorta maximum standardized uptake value: 2.6 (liver maximum standardized uptake value: 2.9)
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F4
Follow-up 18F-FDG PET-CT was carried out after 6 months of treatment which showed complete metabolic and morphologic response [Figure 4].