Normal Esophagus Anatomy

introduction here
cancer anatomy here

The oldest test was a barium swallow or upper GI exam. Also useful is a CT scan  (CT #2) , and normal CT#3, and CT#4, through the chest and cross sectional anatomy here and here.

 Esophageal ultrasound are being used to measure the depth of the tumor invasion without surgery (see another pic here).

The length of the esophagus and landmarks are noted (more detailed anatomy)  and here

also Gray's anatomy, other detailed anatomy pic#1 and pic#2, nodes, nodes#2, nodes#3, nodes #4, GE junction, and cross section, more and more.