Balloon dilation for the treatment of chronic recurrent nasopharyngeal stenosis in a cat

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Abstract
Balloon dilation was used for the treatment of a recurrent nasopharyngeal stenosis in a cat with chronic stertorous breathing. The procedure was performed on three occasions at intervals of three and four months using a 15 mm valvuloplasty balloon dilation catheter. After the first dilation, clinical signs reappeared within two weeks due to re‐stenosis. After the second dilation, all signs of nasopharyngeal disease disappeared, and did not recur. Endoscopic re‐evaluation after four months revealed a markedly enlarged nasopharyngeal opening with some degree of stenosis, and a third balloon dilation was performed. Five months later, the cat remained without clinical signs, although some recurrence of the stenosis was visible endoscopically. Complications occurred after the first dilation, and included mild conchal necrosis and transient mucopurulent discharge. Balloon dilation is a minimally invasive technique and can be a successful procedure for treating nasopharyngeal stenosis in cats.

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