Abstract
Cytological examination showed a large subcutaneous mass on the right lateral elbow of a 5-year-old boxer dog to be pyogranulomatous dermatitis. The entire mass was excised. Because histopathological examination revealed fungal hyphae ofNocardia, we diagnosed pyogranulomatous dermatitis caused byNocardiasubspecies. Long-term adjunctive antibiotic therapy was applied. The large open wound was washed frequently and treated with chitosan, which has incarnant effects. In addition, the wound was covered with chitin-coating dressing as an epithelialization accelerator. On the 60th day, the wound had been reduced about one-tenth from its original size and on the 74th day one-fiftieth. On the 88th day, it was fully closed. After 18 months, there has been no recurrence of the disease.
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