RESUMO
Literature on spontaneous primary bone tumors in nonhuman primates is sparse. This case report describes 2 different neoplastic bone lesions in 2 adult cynomolgus monkeys (Macaca fascicularis), including macroscopic, radiographic, histologic, and immunohistochemical findings. In one monkey, a firm mass located at the palatogingival junction of the left rostral maxilla was confirmed to be a peripheral ossifying fibroma in light of its histologic and immunohistochemical characteristics. In another monkey, a lobulated tumor at the right distal femur that radiographically showed moderate radiopacity with splotchy areas of mineralization was confirmed to be a juxtacortical chondrosarcoma on histologic examination. The 2 neoplastic bone lesions revealed rare histologic and immunohistochemical characteristics and contribute to the known tumor spectrum of cynomolgus monkeys.
Assuntos
Neoplasias Femorais/veterinária , Fibroma Ossificante/veterinária , Neoplasias Maxilares/veterinária , Doenças dos Macacos/diagnóstico , Osteossarcoma Justacortical/veterinária , Animais , Neoplasias Femorais/diagnóstico por imagem , Neoplasias Femorais/patologia , Fibroma Ossificante/diagnóstico por imagem , Fibroma Ossificante/patologia , Macaca fascicularis , Masculino , Neoplasias Maxilares/diagnóstico por imagem , Neoplasias Maxilares/patologia , Doenças dos Macacos/diagnóstico por imagem , Doenças dos Macacos/patologia , Osteossarcoma Justacortical/diagnóstico por imagem , Osteossarcoma Justacortical/patologia , RadiografiaRESUMO
El osteosarcoma paraosteal constituye una neoplasia primaria de hueso, caracterizada por desarrollarse en la superficie ósea; está compuesta por tejido fibroso, óseo y cartilaginoso bien diferenciado pero con características de malignidad. El caso se presentó en un perro Pastor Alemán, macho, de 8 años de edad, diagnosticado por punción con aguja delgada y estudio radiográfico, y confirmado por estudio histológico
Assuntos
Animais , Masculino , Cães , Osteossarcoma Justacortical/patologia , Osteossarcoma Justacortical , Biópsia por Agulha , Osteossarcoma Justacortical/veterinária , Doenças do Cão/patologia , Doenças do CãoRESUMO
A 12-year-old Maltese terrier was evaluated for progressive tetraparesis and neck pain. On radiographs, there was a periosteal reaction involving the fourth cervical vertebra. Myelographically, there was extradural compression of the spinal cord associated with the lesion. The dog was euthanized and necropsied. Histopathologic diagnosis was parosteal osteosarcoma of the vertebra.
Assuntos
Vértebras Cervicais/patologia , Doenças do Cão/diagnóstico , Osteossarcoma Justacortical/veterinária , Neoplasias da Coluna Vertebral/veterinária , Animais , Doenças do Cão/patologia , Cães , Feminino , Fibroblastos/patologia , Mielografia , Cervicalgia/veterinária , Osteoblastos/patologia , Osteossarcoma Justacortical/diagnóstico , Osteossarcoma Justacortical/patologia , Quadriplegia/veterinária , Compressão da Medula Espinal/veterinária , Neoplasias da Coluna Vertebral/diagnóstico , Neoplasias da Coluna Vertebral/patologiaRESUMO
A 2.5-year-old Labrador retriever was evaluated for forelimb lameness. Fine-needle aspirates of a mass in the proximal brachium were suggestive of a mesenchymal tumor. The dog was euthanized and necropsied. Radiographic evaluation and gross and histopathological findings provided a diagnosis of periosteal osteosarcoma in the long head of the triceps.