case_images: PMC11790507_01
case_images: (a) Coronal CT and (b) MRI showing a 28 mm soft tissue mass (RBC - red arrow) adjacent to the right kidney. CT: computed tomography; MRI: magnetic resonance imaging; RBC: retroperitoneal bronchogenic cyst
case_images: cureus-0017-00000076922-i01.jpg
case_images: PMC11790507_01_cureus-0017-00000076922-i01.jpg
case_images: FIG1
case_images: Following the choledochal cyst surgery, subsequent CT scans revealed a 28 mm soft tissue mass of uncertain aetiology (Figure 1a). The mass was hyperintense on both T1- and T2-weighted sequences with no evidence of diffusion restriction (Figures 1b, 2).
case_images: Axial T2 MRI demonstrating the IVC (blue arrow) being compressed by the RBC (red arrow). IVC: inferior vena cava; MRI: magnetic resonance imaging; RBC: retroperitoneal bronchogenic cyst
case_images: cureus-0017-00000076922-i02.jpg
case_images: PMC11790507_01_cureus-0017-00000076922-i02.jpg
case_images: FIG2
case_images: The mass was hyperintense on both T1- and T2-weighted sequences with no evidence of diffusion restriction (Figures 1b, 2).
case_images: Histological findings. The image shows a unilocular cyst lined by ciliated pseudostratified columnar cells with discontinuous fascicles of smooth muscle (green stars) and scattered seromucinous glands (yellow arrow); H&E, x10 magnification
case_images: cureus-0017-00000076922-i03.jpg
case_images: PMC11790507_01_cureus-0017-00000076922-i03.jpg
case_images: FIG3
case_images: The histological findings were consistent with an RBC (Figure 3).