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case_images: Findings from computed tomography scanning.. CT showing a localized low-density area on the right side of the esophagus in the lower part of the mediastinum (arrow).
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case_images: Chest computed tomography (CT) showed a localized area of low density, measuring approximately 2.8 x 2.5 x 2.3 cm3, on the right side of the esophagus in the lower part of the mediastinum (Fig. 1).
case_images: Magnetic resonance imaging findings.. T2-weighted image showing a cystic mass with high signal intensity in the lower thoracic esophagus (arrow).
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case_images: T2-weighted magnetic resonance imaging (MRI) showed a cystic and smooth-edged mass with high signal intensity in the lower thoracic esophagus (Fig. 2).
case_images: Endoscopic ultrasound findings.. EUS image showing a cystic tumor in the esophageal mucosa, with no abnormality, nodules, or partitions within the cyst (dotted line).
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case_images: Endoscopic ultrasound revealed a cystic tumor of the esophageal mucosa with no abnormality, nodule, or partitions within (Fig. 3).
case_images: Thoracoscopic procedure and findings.. A. Placement of four ports. The camera port is inserted in the 9th intercostal space on the scapular line (linea scapularis), and the working ports are inserted in the 4th intercostal space on the posterior axillary line and in the 6th and 8th intercostal spaces on the mid-axillary line. B. and C. Intraoperative findings. The lesion could be easily separated from the esophagus and is seen to be located on the crura of the diaphragm.
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case_images: Four chest trocars were introduced (Fig. 4A). During the surgery, the lesion could be easily separated from the esophagus and was seen to be located on the crura of the diaphragm rather than on the esophagus (Fig. 4B and C).
case_images: Pathological findings. The wall of the lesion is composed of fibrous fatty tissue and is lined internally with a typical pseudostratified ciliated columnar epithelium (arrow) (hematoxylin & eosin [H&E] stain, x200).
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case_images: Pathological examination revealed that the lesion contained fibrous and fatty wall-structures and was internally lined with typical pseudostratified ciliated columnar epithelium (Fig. 5).