Which two veins can the esophageal veins drain into?

The esophageal veins can drain into two main veins: the azygos vein and the gastric veins.

1. Azygos Vein: The azygos vein is a large vein running up the right side of the thoracic vertebral column. It can receive blood from the esophageal veins which drain the esophagus.

2. Gastric Veins: The esophageal veins can also drain into the left and right gastric veins. These veins are branches of the portal vein that drain the lesser curvature of the stomach and the esophagus.