Fig. 2From: Removal of tumor thrombus from the azygos vein in an esophageal squamous cell carcinoma patientTumor thrombus at the arch of azygos vein. a Intraoperatively, the arch of azygos vein was hard in nature. b tumor thrombus was about 3 cm in length. c location of the tumor thrombus in the arch of azygos vein, and the red area represents the tumor thrombusBack to article page