Treatment of extraskeletal osteosarcoma at a previous injection site resulting in prolonged survival in 1 dog.
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abstract
A rare presentation of an extraskeletal osteosarcoma at a previous interscapular injection site in a dog is described. Treatment included surgical excision of the tumor followed by 6 rounds of intravenous carboplatin, oral toceranib, and cyclophosphamide. The dog survived for 20.5 months after diagnosis despite early development of pulmonary metastases.