Epidemiological Data in Canidae Osteosarcoma

摘要

The osteosarcoma is a malignant bony tumour which localizes in most cases at thelevel of medullar cavity of the bony metaphysis, gradually invading the adjacent tissues. Theosteosarcom generally alter large breed individuals over 7 years old on the average. Thepresent paper tries to present the epidemiological aspects concerning the prevalence ofosteosarcoma in dogs.The study was carried out in 2008-2010 in the clinics of the Faculty of VeterinaryMedicine Bucharest on 87 dogs, which were diagnosed with osteosarcoma. The animals wereclinically, radiologically and histologically investigated.After all these investigations, we found out the prevalence of the skeletonosteosarcoma in 98.85% cases in comparison with the extraskeletal osteosarcoma 1.15%. Theanimals which were diagnosed with osteosarcom represented 56.32% males, and 43.68%female. Considering the age of the animals we can mention: 3.45% between 1 and 5 years,73.56% 5-10 years, and 32.98% over 10 years. 83.72% of the cases of skeletal osteosarcomhad appendicular localization and 16.28% axial localization. Regarding the appendicularlocalization we mention the following: 43.06% at the metaphysis level, 41.67% at theepiphysis level, and 15.28% at the diaphysis level. Axial localization osteosarcom weredistributed like this: 64.29% at the skull, 14.29% at the spine, 14.29% at pelvis area, and7.14% at ribs. The histological aspects were different, especially based on the presence ofosteocites and osteoblastes proliferation. The radiologic aspects were characterized by thepresence of same osteolisis areas and bony proliferation existing sometimes an alternationbetween those two aspects and their intensity varied considering the evolution of the disease.