Obstructive Disorders of the Esophagus
Most esophageal obstruction develops slowly and is incomplete when patients first seek care, typically for difficulty swallowing solids. However, sometimes complete esophageal obstruction develops suddenly because of an impacted esophageal foreign body or food bolus.
Obstruction may have intrinsic or extrinsic causes.
Intrinsic obstruction may be caused by
Extrinsic obstruction may be caused by compression resulting from
An enlarged left atrium
An aberrant subclavian artery (termed dysphagia lusoria)
A substernal thyroid gland
Cervical bony exostosis
For evaluation of potential esophageal obstruction, see Dysphagia.