Thoracoscopic resection of a huge esophageal dedifferentiated liposarcoma: A case report

Figure 2 Esophagogastric ultrasonography showed a homogeneous, low echogenic mass outside the esophagus. A: Esophagogastroscopy showed a large mass pushing against the esophagus; B: Esophagogastric ultrasonography showed a large, homogeneous, low echogenic mass outside the esophagus, 20–40 cm below the incisor, with a cross-sectional area of 21.5 mm × 15.9 mm.