“…In addition to mitotic figures, the presence of multicore bizarre giant cells was not found as described in previous studies (8,9,12). Similar to the literature data (13,14), the trabecular structures in the middle of irregular atypical chondroblastic cell proliferation and the presence of inflammatory infiltration were identified and therefore the mass from the collum femoris was classified as chondroblastic osteosarcoma. Among the localization of feline osteosarcomas, many bones such as maxilla, mandible, skull, scapula, rib, vertebrae, pelvis, nasal cavity and tail vertebrae have been reported.…”