A red-tailed hawk (Buteo jamaicensis) was presented because of dyspnea subsequent to 2 celiotomy procedures. Respiration markedly improved after an air sac cannula was placed. Tracheoscopy revealed a mass firmly adhered to the proximal tracheal wall. Because of lack of response to medical therapy, 5 tracheal cartilages were surgically resected and an end-to-end tracheal anastomosis was performed. On histologic examination of the mass, vacuolated macrophages, fibrosis, and occasional cholesterol clefts were identified, consistent with a diagnosis of xanthogranulomatosis. We propose that a single term, xanthogranulomatosis, replace the varied terms currently used to describe the syndromes in avian species in which intracytoplasmic lipid is found within tissue macrophages.
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Vol. 20 • No. 4