Merck Manual

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Congenital Esophageal Disorders of Dogs

Congenital Esophageal Disorders of Dogs

Type

Cause

Breeds Most Often Affected

Congenital megaesophagus

Abnormal nerve development in esophagus; sometimes part of more widespread nerve, metabolic, or digestive problems

Chinese Shar-Peis, Fox Terriers, German Shepherds, Great Danes, Irish Setters, Labrador Retrievers, Miniature Schnauzers, Newfoundlands; often part of laryngeal paralysis-polyneuropathy complex in Dalmatians and Pyrenees Mountain Dogs

Vascular ring entrapment

Physical constriction of the esophagus by other tissues, especially blood vessels

Boston Terriers, German Shepherds, Irish Setters

Cricopharyngeal achalasia

Failure of the cricopharyngeal muscle (in the throat) to relax during swallowing

Cocker and Springer Spaniels