Congenital bilateral choanal stenosis in a warmblood foal.

This study deals with a rare case of congenital bilateral choanal stenosis in a seven-month-old warmblood filly. The condition, characterized by severe respiratory issues and exercise intolerance, was diagnosed using Computerized Tomography (CT).

Research Background and Objectives

• This study focused on a case of congenital bilateral choanal stenosis, occurring in a specific breed of horse, the warmblood filly. The aim was to investigate the condition and understand its presentation, with a view to better medical diagnosis and potential treatment options.
• The study provided justification for its focus, explaining that congenital deformities affect between 1 and 4 percent of foals, with head malformations being particularly uncommon. Notably, the condition can present life-threatening implications.

Case Presentation and Diagnosis

• The filly was seven months old and had shown signs of respiratory stress and exercise intolerance since birth. No similar conditions were reported among its siblings.
• Initial assessments, which included physical examination, routine hematology, biochemistry, and arterial blood gas analysis, were all normal. However, during exercise, an abnormal harsh stridor was present.
• A radiograph marking bilateral narrowing of the caudal nasal cavity, and an endoscopy showing a narrowed space between the common nasal meatus and the nasopharynx, indicated choanal stenosis. The diagnosis was confirmed through a CT scan, which showed that the airway aperture was significantly smaller in the affected filly than in an unaffected one.

Prognosis and Treatment Approaches

• The prognosis was poor, with the study determining that medical or surgical treatment was unlikely to significantly improve the filly’s condition.
• Given the severity of the disease, possible heritability, and a bleak outlook for the horse’s future athletic performance, euthanasia was carried out at the owner’s request.

Conclusion and Implications

• The study concluded that congenital bilateral choanal stenosis in horses is a serious condition that is difficult to treat and can seriously inhibit a horse’s performance.
• This case study contributes to a better understanding of the condition, offering insights that could potentially inform future research efforts towards developing more effective treatment strategies.