Extraskeletal Subcutaneous Osteosarcoma of the Rump in a Rottweiler: A Case Report

Pompei BOLFA, Cosmin MURESAN, Gabriel BORZA, Andras NAGY, Flaviu TABARAN, Adrian GAL, Marian TAULESCU, Cornel CATOI


Canine extraskeletal osteosarcomas are rare tumors, and subcutaneous osteosarcoma in particularis extremely rare diagnosed in dogs. The current report presents a case of a subcutaneous tumor in the upperleft rump of a 9 years old, male Rottweiler dog. The mass measured 6.0×5.5×4.2 cm, was encapsulated, firm,multilobulated, adherent to the muscles in the area, grew slow, in about nine months. Cytology examfollowing fine neeedle aspirate revealed small clusters of spindle shaped cells with oval nuclei with 2 -3prominent nucleoli, and strongly basophilic cytoplasm, with small vacuoles. Cytological exam was followedby surgery, and the animal presented no signs of recurrence, or metastasis, at 115 days post-excision.Histological exam revealed clusters of large, pleomorphic, round to oval shaped cells, irregular ovoid tospindle nuclei with highly mitotic figures some showing osteoid and bony formation. Cytopathological andhistopathological findings led to the conclusion that the soft tissue tumor should be diagnosed as asubcutaneous osteosarcoma. In this report, we describe a case of primary extraskeletal subcutaneousosteosarcoma with cytological and histopathological findings.


propolis, skin, mouse, UVB-damage, inflammation

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DOI: http://dx.doi.org/10.15835/buasvmcn-vm:69:1-2:8424

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