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Osteosarcoma 11 years after TPO
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TPO (triple pelvic osteotomy) has become a very popular and effective therapy in dogs with severe hip dysplasia. Are these dogs at an increased risk to develop osteosarcomas later in their life? A very interesting case report!
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An osteosarcoma (OSA) involving the right pelvis was diagnosed in a 12-year-old golden retriever 11 years after triple pelvic osteotomy (TPO) surgery.
The dog was presented with a 12-week history of nonweight-bearing lameness of the right hind limb.
Radiographs demonstrated an aggressive bone lesion of the right ilium with profound periosteal proliferation and punctate lysis that extended along the ilium caudally and into the right ischium, with its epicenter at the level of the right TPO plate.
Necropsy revealed that the entire right hemipelvis, especially the ischium, was markedly thickened and firm with irregular margins. Histopathology was consistent with a diagnosis of OSA.
Source: Brian W. Rose, Robert E. Novo, Erik J. Olson (2005): Osteosarcoma at the Site of a Triple Pelvic Osteotomy in a Dog. In: Journal of the American Animal Hospital Association 41:327-331 (2005)
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