case_images: PMC11151408_01
case_images: Coronal reformatted (a-b) and sagittal (c-d) sections of the contrast CT abdomen of case 1 show (a-c) a circumferential cuff of non-enhancing soft tissue mass encircling the right upper ureter and renal pelvis, extending for a length of approximately 12 cm along the upper ureter; (d) cuff of soft tissue mass involving the left upper ureter causing luminal effacement.
case_images: SAJR-28-2830-g001.jpg
case_images: PMC11151408_01_SAJR-28-2830-g001.jpg
case_images: F0001
case_images: There was associated marked peripelvic fat stranding and a cuff of non-enhancing soft tissue encircling the right upper ureter and renal pelvis, measuring 33 mm x 28 mm (Anteroposterior [AP] x transverse) extending for a length of approximately 12 cm along the upper ureter (Figure 1a-c). The left kidney revealed a 7 mm x 8 mm hyperdense calculus with a mean attenuation value of 780HU in the left upper ureter with a similar non-enhancing soft tissue mass cuffing the left renal pelvis and upper ureter for a length of 7 cm - 8 cm, maximum AP and transverse diameters of 23 mm x 12 mm, respectively (Figure 1d).
case_images: PMC11151408_02
case_images: Axial (a) and sagittal (b-c) MR images of the lumbar spine of case 2 show a short tau inversion recovery (STIR) hyperintense (a) and T1-weighted and T2-weighted hypointense (b-c) circumferential mass encasing the abdominal aorta and IVC.
case_images: SAJR-28-2830-g002.jpg
case_images: PMC11151408_02_SAJR-28-2830-g002.jpg
case_images: F0002
case_images: Imaging revealed a T1-weighted (T1-W) and T2-weighted (T2-W) hypointense mass surrounding the abdominal aorta, hyperintense in signal on short tau inversion recovery (STIR) images (Figure 2a-c).
case_images: Sagittal reformatted (a) and axial (b) sections of the contrast-enhanced CT abdomen of case 2 demonstrate a fibrotic soft tissue cuff encasing the abdominal aorta with no definite luminal effacement of the aorta.
case_images: SAJR-28-2830-g003.jpg
case_images: PMC11151408_02_SAJR-28-2830-g003.jpg
case_images: F0003
case_images: Abdominal CECT revealed a long segment of circumferential, hypodense, mildly enhancing soft tissue mass with an infiltrative and spiculated appearance in the retroperitoneum, completely encasing the infrarenal aorta and inferior vena cava (IVC), extending along the proximal portions of the common iliac arteries without ureteric involvement (Figure 3a and 3b).
case_images: PMC11151408_03
case_images: Axial (a-b) and sagittal (c) sections of the CT abdomen of case 3 reveal features of chronic pancreatitis (a), soft tissue cuffing of the long segment of the superior mesenteric artery (b-c).
case_images: SAJR-28-2830-g004.jpg
case_images: PMC11151408_03_SAJR-28-2830-g004.jpg
case_images: F0004
case_images: It also revealed a cuff of non-enhancing soft tissue mass encircling the proximal 6.5 cm length of the superior mesentery artery with a maximal thickness of 10 mm, extending into the peripancreatic and/or pancreaticoduodenal groove (Figure 4a-c).
case_images: PMC11151408_04
case_images: Sagittal (a and c) and coronal (b) sections of the CT abdomen indicate atheromatous calcific plaques on unenhanced CT (a) involving the aorta, with a soft tissue cuff involving the infrarenal abdominal aorta on contrast-enhanced CT (b-c).
case_images: SAJR-28-2830-g005.jpg
case_images: PMC11151408_04_SAJR-28-2830-g005.jpg
case_images: F0005
case_images: No other abnormality was noted at CT imaging (Figure 5a-c).
case_images: PMC11151408_05
case_images: Sagittal (a) and coronal (b) contrast-enhanced CT images show a soft tissue cuff along the abdominal aorta (a-b) and along both upper ureters (b) with ureteric stents in-situ (b).
case_images: SAJR-28-2830-g006.jpg
case_images: PMC11151408_05_SAJR-28-2830-g006.jpg
case_images: F0006
case_images: The CT images revealed a circumferential cuff of non-enhancing soft tissue surrounding the abdominal aorta and both upper ureters with periureteric fat stranding causing luminal narrowing of the ureters and aorta (Figure 6a and 6b).