15 April 2022
: Case report 
A 61-Year-Old Woman Presenting with Low Back Pain Diagnosed with IgG4-Related Disease Affecting the Thoracoabdominal Aorta and Retroperitoneum
Challenging differential diagnosis, Rare disease, Educational Purpose (only if useful for a systematic review or synthesis)
Mi Ra Kim ABCDEF 1, Hyekyung Shim ABCDEF 2*DOI: 10.12659/AJCR.935007
Am J Case Rep 2022; 23:e935007
Figure 1 Representative computed tomography (CT) and 2-[18F]-fluoro-2-deoxy-D-glucose positron emission tomography/CT (F-18-FDG-PET/CT) images at diagnosisOn coronal contrast-enhanced CT (A) and maximum intensity projection (B) and coronal fusion images of F-18-FDG-PET/CT (C), circumferential infiltrative soft tissue attenuated lesions with contrast enhancement and diffuse heterogeneous FDG uptake along the aortic arch (maxSUV: 13.3) involving the origin of three branches without obstruction and the abdominal aorta from the gastroesophageal junction to both the common and right internal iliac arteries (9.2) are noted (white arrows). Right obstructive hydronephrosis is noted on maximum intensity projection images of F-18-FDG-PET/CT (black arrow). On axial contrast-enhanced CT (D) and F-18-FDG-PET/CT (E), there is a soft tissue lesion encasing the renal arteries, arising from the abdominal aorta (white dotted arrows). The bilateral renal veins are also indicated (double arrow).