case_images: PMC10860574_01
case_images: Axial pre-contrast (A), post-contrast late arterial phase (B), and post-contrast delayed phase (C) CT images demonstrating a nonenhancing, homogenous, well-circumscribed, thin-walled cystic mass. The lesion shows a central attenuation of 41 HU in the pre-contrast CT image, 44 HU in the post-contrast late arterial phase CT image, and 43 HU in the post-contrast delayed phase CT image.
case_images: uaad001f1.jpg
case_images: PMC10860574_01_uaad001f1.jpg
case_images: uaad001-F1
case_images: The lesion was non-enhancing on pre-contrast phase, homogenous, thin walled, well circumscribed, with possible haemorrhagic or proteinaceous change (Figure 1), without mural nodules or septations.
case_images: Axial (A), coronal (B), and sagittal (C) post-contrast CT images showing a left retroperitoneal suprarenal cyst (star) pushing the left kidney posteroinferiorly, the left adrenal gland (A, B; white arrow) medially, and the stomach superoanteriorly. The cyst is adjacent to the left adrenal gland, pancreas, and the stomach. There is no fat tissue between them.
case_images: uaad001f2.jpg
case_images: PMC10860574_01_uaad001f2.jpg
case_images: uaad001-F2
case_images: The origin of the mass was uncertain, but neighbouring structures included the left adrenal gland, pancreas, spleen, left kidney, gastric wall, and proximal small bowel (Figure 2).