Esophageal duplication cyst: adult male who presented with abdominal pain. CT incidentally showed a fluid density structure (arrow) in the inferior posterior mediastinum adjacent to the esophagus (A) with location and appearance most consistent with an esophageal duplication cyst. The patient underwent an abdominal MRI at a later date for other reasons, showing the same lesion again as a well-defined, homogenous, hyperintense cystic structure (B) on this T2-weighted fat-suppressed image. Hepatic cysts are also seen on both images
Gandhi, D., Garg, T., Shah, J. et al. Gastrointestinal duplication cysts: what a radiologist needs to know. Abdom Radiol 47, 13–27 (2022). https://doi.org/10.1007/s00261-021-03239-w
Esophageal duplication cyst: another adult patient with an incidentally found inferior, posterior mediastinal mass adjacent to the esophagus (arrow on A) on contrast-enhanced CT with a homogenous, hypoattenuating appearance found to have fluid density and most consistent with an esophageal duplication cyst. This mass is shown in axial, coronal, and sagittal views (A, B, and C, respectively)
Gandhi, D., Garg, T., Shah, J. et al. Gastrointestinal duplication cysts: what a radiologist needs to know. Abdom Radiol 47, 13–27 (2022). https://doi.org/10.1007/s00261-021-03239-w