Problems in the esophagus and pharynx can be identified and treated with a barium swallow test. A barium swallow test may be required if your doctor suspects that you have: Disease of the head and neck, pharynx, or throat.
Barium Swallow Test - An Overview
A barium swallow is an imaging test that checks for problems in the mouth, throat, esophagus, stomach, and part of the small intestine.
Nonspecific Esophageal Disorder - Symptoms, Diagnosis, and Treatment
The nonspecific esophageal disorder is a vague category used to describe patients with esophageal dysmotility.