Figure 1.

Mass showed before the surgery. A: The frontal chest radiograph showed a widened and undulated mediastinal contour; B: Barium esophagogram demonstrated a multilobulated protuberant lesion with a relatively smooth margin in the middle thoracic esophagus; C: Chest CT scan revealed a 13 cm × 5 cm × 6 cm hyperdense soft-tissue mass, originated from the posterior wall of the esophagus. The mass was well demarcated from the surrounding structures protruded into the esophageal lumen and compressed the trachea and the right main bronchus, and no metastases noted was found; D: ESU demonstrates a hypoechoic, homogeneous, well-demarcated mass, arising at 24 cm from the incisors and extending to 35 cm and arising from the muscularis propria of the esophagus.