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Use of intralesional formalin administration for treatment of a subepiglottic cyst in a horse

Sarah S. Dougherty DVM1 and Jan L. Palmer DVM, PhD, DACVS2
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  • 1 Willamete Valley Equine Surgical and Medical Center, 23200 Hubbard Rd NE, Aurora, OR 97002.
  • | 2 Willamete Valley Equine Surgical and Medical Center, 23200 Hubbard Rd NE, Aurora, OR 97002.

Abstract

Case Description—A 4-year-old horse was evaluated for chronic coughing, mucopurulent nasal discharge, and failure to thrive.

Clinical Findings—Endoscopy was performed on the larynx, pharynx, and trachea and revealed an approximately 2-cm fluctuant subepiglottic cyst.

Treatment and Outcome—The subepiglottic cyst was treated with intralesional formalin administration. Following 2 injections, 2 weeks apart, the cyst was completely resolved with no evidence of scarring or epiglottic deformity.

Clinical Relevance—Findings suggest that intralesional formalin administration for treatment of subepiglottic cysts may be a minimally invasive, economically suitable alternative to surgical treatments.

Contributor Notes

Address correspondence to Dr. Dougherty.