PMC4061149_01
Case 1. Contrast-enhanced chest CT. A solid mass with cyst and branching fluid collection is apparent above the right dorsal diaphragm.
poljradiol-79-145-g001.jpg
PMC4061149_01_poljradiol-79-145-g001.jpg
f1-poljradiol-79-145
Chest computed tomography (CT) showed a well-circumscribed dome-like solid mass with cysts and branching fluid collection above the right dorsal diaphragm (Figure 1).
Case 1. Contrast-enhanced MRI, sagittal image. (A) T2WI; (B) T1WI (FS); (C) contrast-enhanced T1WI (FS). The solid part of the mass showed inhomogeneous low signal intensity on T2WI and strong enhancement on contrast-enhanced T1WI (FS).
poljradiol-79-145-g002.jpg
PMC4061149_01_poljradiol-79-145-g002.jpg
f2-poljradiol-79-145
Magnetic resonance imaging showed the solid part of the mass as a region of inhomogeneous low signal intensity on T2-weighted images and enhanced strongly on contrast-enhanced T1-weighted imaging, while cysts and fluid collection within the mass were isointense with water on both T1- and T2-weighted images (Figures 2 and 3).
(A-C) Case 1. Unenhanced MRI, sagittal T2 WI. The mass shows an inhomogeneous low signal with cyst and branching signal hyperintensity.
poljradiol-79-145-g003.jpg
PMC4061149_01_poljradiol-79-145-g003.jpg
f3-poljradiol-79-145
Magnetic resonance imaging showed the solid part of the mass as a region of inhomogeneous low signal intensity on T2-weighted images and enhanced strongly on contrast-enhanced T1-weighted imaging, while cysts and fluid collection within the mass were isointense with water on both T1- and T2-weighted images (Figures 2 and 3).
PMC4061149_02
Case 2. Contrast-enhanced chest CT. A mass is present in the azygo-esophageal recess, and only the periphery is enhanced. A small amount of pleural effusion is seen on the right side.
poljradiol-79-145-g004.jpg
PMC4061149_02_poljradiol-79-145-g004.jpg
f4-poljradiol-79-145
Contrast-enhanced CT of the chest and abdomen revealed a 4-cm fusiform mass in the azygo-esophageal recess (Figure 4).
Case 2. Contrast-enhanced MRI, sagittal image. (A) T2WI (FS); (B) T1WI; (C) enhanced T1WI (FS). The mass shows inhomogeneous low signal on T2WI (FS), slightly high signal on T1WI, and enhancement only at the periphery.
poljradiol-79-145-g005.jpg
PMC4061149_02_poljradiol-79-145-g005.jpg
f5-poljradiol-79-145
On magnetic resonance imaging, the mass showed inhomogeneous low signal with branching signal hyperintensity on T2-weighted images, slight hyperintensity on T1-weighted images, and contrast enhancement only at the periphery (Figures 5 and 6).
Case 2. Unenhanced MRI, sagittal T2WI (FS). The mass shows an inhomogeneous low signal with branching signal hyperintensity.
poljradiol-79-145-g006.jpg
PMC4061149_02_poljradiol-79-145-g006.jpg
f6-poljradiol-79-145
On magnetic resonance imaging, the mass showed inhomogeneous low signal with branching signal hyperintensity on T2-weighted images, slight hyperintensity on T1-weighted images, and contrast enhancement only at the periphery (Figures 5 and 6).
Histopathological study of Case 2. The mass shows total hemorrhagic necrosis and remaining circular lining cartilage.
poljradiol-79-145-g007.jpg
PMC4061149_02_poljradiol-79-145-g007.jpg
f7-poljradiol-79-145
Microscopically, the mass contained circular lining cartilage and fat, and received its blood supply from an artery in the pedicle (Figure 7).