What is Esophageal Cancer? The esophagus is a part of the digestive system that connects the throat (pharynx) to the stomach. It is located between the trachea and the spine, measuring approximately 25 cm (9.8 inches) in length, 2-3 cm (0.8-1.2 inches) in diameter, and 4 mm (0.16 inches) in wall thickness. Its primary function…