Abdominal pa of esophagus Here, the veins drain paly into poal & paly into systemic circulation . Veins accompanying left gastric vein drain into poal vein. Others drain into hemiazygos, in thoracic cavity, & continue into vena azygous & superior vena cava. venous drainage of pa of esophagus Cervical pa - Drain into submucosal plexus then to inferior thyroid vein & then to brachiocephalic veins Thoracic pa - Azygous veins Abdominal pa - Drains into left gastric vein & vena azygous hemiazygous vein.