Esophagus Idiopathic Muscular Hypertrophy Basic Information Definition Muscular hypertrophy of the small muscle layers of the distal esophagus Epidemiology Associated Conditions and Disorders Idiopathic muscular hypertrophy of other regions of…

Cardiotoxic Plants Basic Information Definition Cardiac disease subsequent to exposure to toxic plants Synonym(s) • Oleander poisoning (Nerium oleander) • Summer pheasant’s eye poisoning (Adonis aestivalis) • Grayanotoxin intoxication (Azalea…

Esophageal Fistula Basic Information Definition Permanent opening of esophagus draining to the skin surface Epidemiology Risk Factors • Esophageal rupture • Esophageal surgery Associated Conditions and Disorders Esophageal fistula may…

Cataracts Basic Information Definition Cataracts are opacities of the eye’s crystalline lens or lens capsule. Epidemiology Genetics and Breed Predisposition Horses prone to developing recurrent uveitis are at risk for…

Esophageal Obstruction Basic Information Definition Obstruction of the esophageal lumen Synonym Choke Epidemiology Risk Factors • Horses and ponies that have ravenous appetites or “bolt” their feed may be at…

Esophageal Duplication Cyst Basic Information Definition A congenital cystic formation attached to or originating from the esophagus that has the same structure as the esophagus Epidemiology Species, Age, Sex Foals…

Atrioventricular Block, Second Degree Basic Information Definition The supraventricular impulse is intermittently blocked at the level of the atrioventricular (AV) node, resulting in a “missed” ventricular beat. At rest, this…

Colitis, Antimicrobial Associated Basic Information Definition Colitis or diarrhea that occurs during or shortly after administration of antimicrobial drugs Epidemiology Risk Factors Antimicrobial administration: • May occur with any antimicrobial…

Epiglottic Entrapment Basic Information Definition Epiglottic entrapment occurs when aryepiglottic tissue envelops the epiglottis. Epidemiology Species, Age, Sex Most common in young racehorses Genetics and Breed Predisposition The disorder is…

Esophageal Rupture Basic Information Definition Rupture of the wall of the esophagus Synonym Esophageal perforation Epidemiology Risk Factors • Chronic esophageal obstruction • Kick wounds to the neck region Associated…