fig3
Figure 3. Thoracoscopic 4K ultra-high-definition view. A: detaching the meso-esophagus on the left side while preserving the visceral sheath; B: aggregating the lymphatic chain to the esophageal side on the left side; C: upper mediastinal lymph node dissection on the right side; D: upper mediastinal lymph node dissection on the left side
