Oteossarcoma associado a osteopatia hipertrófica em cão - Relato de caso

Abstract

Bone neoplasms that affect dogs and cats represent approximately 5% of general neoplasms, and when affected, around 85% are characterized as osteosarcoma. Within the differential diagnosis there is osteomyelitis, however the need for further additional tests, such as x-ray, ultrasound and histopathological analysis. The objective is to report a clinical-surgical case of a dog diagnosed with osteosarcoma associated with hypertrophic osteopathy and emphasize the importance of the diagnosis obtained through imaging and histopathological exams, as well as surgical treatment. The radiographic findings suggested a bone neoplasm and were confirmed by histopathological examination. The definitive diagnosis of osteosarcoma was obtained through histopathological analysis of the surgical material. Where a solid mantle of pleomorphic neoplastic mesenchymal cells was observed, with elongated eosinophilic cytoplasm varying from moderate to sparse, it is evident mineralized bone matrix surrounded by neoplastic mesenchymal cells and also, amid the neovascularized tumor, necrotic areas with cell debris were observed. Histopathological diagnosis was osteosarcoma. The animal had a survival of about four months, after which it had complications of pulmonary metastasis associated with hypertrophic osteopathy.