A 1-year-old male canary (Serinus canaria, Jibber breed), with a protuberance on the left tibia was referred to the clinic. The bird was not able to use the affected foot to stand on its perch. Results of radiographs revealed a radio-opaque hard tissue mass. The canary was euthanatized and submitted for necropsy. On histopathologic examination, the mass was diagnosed as an ossifying fibroma tumor. To our knowledge, ossifying fibroma has not been reported in birds so far, and this is the first known report of this tumor in birds.
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