Multiple Foreign bodies in the GI tract (3 of 12)

The esophagus is a tubular structure approximately 20-25
cm in length. Patients can usually localize foreign bodies in
the upper esophagus but localize them poorly in the lower
two thirds of the structure. The esophagus has 3 areas of
narrowing where foreign bodies are most likely to become
entrapped: the upper esophageal sphincter (UES), which
consists of the cricopharyngeus muscle; the crossover of
the aorta; and the lower esophageal sphincter (LES).
Structural abnormalities of the esophagus, including
strictures, webs, diverticula, and malignancies, increase
the risk of foreign body entrapment, as do motor
disturbances such as scleroderma, diffuse esophageal
spasm, or achalasia.