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Nonsurgical removal of chondroid masses from the guttural pouches of two horses

1991; American Veterinary Medical Association; Volume: 199; Issue: 3 Linguagem: Inglês

10.2460/javma.1991.199.03.368

1943-569X

Thomas L. Seahorn, James Schumacher,

Veterinary Oncology Research

A 2-month-old Quarter Horse colt was admit- ted to the veterinary medical center because of bilateral, intermittent, mucopurulent nasal discharge since birth.The colt had been treated with antimicrobial drugs (penicillin, penicillin-dihydrostreptomycin-dexamethasone-chlorpheniramine: trimethoprim-sulfamethoxazole b ) and had responded to each treatment with a reduction in nasal discharge.Nasal discharge resumed, however, after antimicrobial therapy was discontinued.The colt was alert and had normal temperature, pulse rate, and respiratory rate .Bilateral mucopurulent nasal discharge was observed.Auscultation of both hemithoraces revealed no abnormalities, but when the trachea was auscultated, a fluttering sound suggestive of fluid was heard.Thoracic radiography revealed no abnormalities, but radiography of the skull revealed radiodense material within the guttural pouches.Mucopurulent exudate was observed at the openings of the guttural pouches and in the proximal trachea during endoscopiC examination of the upper airways.Mucopurulent exudate was also observed bilaterally when the endoscope was passed into the guttural pouches.Exudate specimens were collected from each pouch for bacterial culturing, which yielded growth of Streptococcus zooepidemicus.The colt was sedated with xylazine (O .S mg/kg of body weight), and a No. S F polypropylene catheter was passed into each guttural pouch.Each guttural pouch was lavaged with 1.S L of lactated Ringer solution.Chondroid masses were identified when the guttural pouches were reexamined endoscopically.The chondroid masses were 1 to 3 cm in diameter and numbered 10 to IS in each pouch.Repeated attempts to lavage the chondroid masses from the guttural pouches were unsuccessful.A diathermic snare,t passed through the biopsy port of Fro m the