A 6-year-old male cross-breed rabbit ( Oryctolagus cuniculus) was presented with lameness and severe swelling from the right shoulder to brachium.
On 16-detector helical computed tomography images of the amputated right forelimb after being fixed in formalin, evident proliferative and destructive lesions of bone were observed. On histologic examination, the tumor was composed of proliferating neoplastic cells that resembled histiocytes, with abundant osteoid production.
A large number of multinucleated giant cells were found throughout.
This case was diagnosed as osteosarcoma by clinical, radiographic, and histologic findings.
This is a rare case report of osteosarcoma in a rabbit consistent with canine predilection sites.
Source: H. Kondo, M. Ishikawa, H. Maeda, M. Onuma, M. Masuda, H. Shibuya, H. Koie and T. Sato (2007): Spontaneous Osteosarcoma in a Rabbit ( Oryctolagus cuniculus). In: Vet Pathol 44:691-694 (2007)
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