A 12-yr-old captive intact male maned wolf (Chrysocyon brachyurus) was diagnosed with a fibrosarcoma of the incisive bones. The mass was excised by rostral maxillectomy, and the wolf remained normal and on display with good function and cosmetics for 7 mo. Subsequently, it became weak, ataxic, and dyspneic and was euthanatized. At necropsy, there was a small regrowth of the maxillary tumor, a metastatic mediastinal mass, and multiple metastatic lung masses, suggesting that oral fibrosarcoma in maned wolves behaves similarly to oral fibrosarcoma in domestic canines. Aggressive surgical treatment of oral fibrosarcoma in this species can achieve good functional and cosmetic results.
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Vol. 31 • No. 3