case_images: PMC5204112_01
case_images: Axial contrast-enhanced CT scan. The mass consisted of a cystic component (arrow) and a nodular fatty component (arrowhead) at the right adrenal region. A high-density fluid-fluid level was also seen in the cystic component. No enhancing component was observed.
case_images: CRIRA2016-6976137.001.jpg
case_images: PMC5204112_01_CRIRA2016-6976137.001.jpg
case_images: fig1
case_images: A high-density fluid-fluid level was also seen (Figure 1).
case_images: Axial MRI. (a) Fat-suppressed T2-weighted image showed heterogeneous high intensity inside the cystic component of the mass (arrow). The fatty component showed low intensity (arrowhead). (b) T1-weighted image showed relative homogeneous isointensity inside the cystic component of the mass (arrow). (c) ADC map showed slightly restricted diffusion compared with cerebrospinal fluid. Its ADC value was 2.0 x 10-3 mm2/sec.
case_images: CRIRA2016-6976137.002.jpg
case_images: PMC5204112_01_CRIRA2016-6976137.002.jpg
case_images: fig2
case_images: On magnetic resonance imaging (MRI), the cystic component showed heterogeneous high intensity on fat-suppressed T2-weighted images (Figure 2(a)) and relatively homogeneous isointensity compared to the muscle on T1-weighted images (Figure 2(b)). ADC value was 2.0 x 10-3 mm2/sec, suggesting slightly restricted diffusion compared with the cerebrospinal fluid (Figure 2(c)). A nodular fatty component was again identified on MRI (Figures 2(a) and 2(b)).
case_images: Microphotographs of the cystic wall. The wall consisted of large intestinal mucosa, submucosa, muscle layers, and serosa (arrow). The cyst was filled with viscous mucus (arrowhead). A cellular component was not seen (high magnification, hematoxylin and eosin staining).
case_images: CRIRA2016-6976137.003.jpg
case_images: PMC5204112_01_CRIRA2016-6976137.003.jpg
case_images: fig3
case_images: Its content was viscous mucus (Figure 3).
case_images: Oblique MPR images of contrast-enhanced CT scan. A tortuous tubular complex shape of the mass (arrowheads) was clearly observed. The nodular fatty component of the mass continued to the normal retroperitoneal fat (arrows).
case_images: CRIRA2016-6976137.004.jpg
case_images: PMC5204112_01_CRIRA2016-6976137.004.jpg
case_images: fig4
case_images: Retrospective multiplanar reconstruction (MPR) oblique images revealed the appearance of a tortuous tubular cyst clearly and showed that the nodular fat-density component of the mass was continuous with the normal retroperitoneal fat (Figure 4).