Abstract
Squamous Cell Carcinoma (SCC) is the most frequent neoplasia in bovines. This work determined the SCC frequency and the associated risk factors from 2007 to 2019 in Nariño Province. Eighty-two cases from the big animal clinic database at the Universidad de Nariño were analyzed. The variables considered herein include: breed, age, parity, tumor location, skin pigmentation and MASL of the farms. Three groups were created: < 3 years old (younger), from 4 to 7 years old (adults), and > 8 years old (elder). The 56 farms are located at 2973 ± 197.01 meters above sea level. The studied breeds include Holstein 81.2%, Normando 7.2%, Montbeliarde 3.4%, Simhol 3.4%, Criollas 2.4%, Jersey 1.2% and Cebú 1.2%. the SCC compromised the eye and periorbital regions in 85.3% of the cases, followed by the vulva 11.1%, and 3.9% in the back, udder and horns. Skin depigmentation was observed in 31.7% of the cases. The average age was 7.7 ± 1.58 years; 2 heifers, 58 adults and 22 elders with a parity of 4.7 ± 1.35 on average. Appearance frequency was significantly higher in adult animals (p<0,001). The location of the carcinoma was greater in the eye and the periorbital tissue (p<0,005). The appearance was significantly higher in animals with non-pigmented skin areas and in the Holstein breed (p<0.005 and p<0.001, respectively). The risk factors found in this research were age, depigmentation and MASL of the farms. This study is the first report of occurrence and factors associated with the SCC in bovines in the Nariño ProvinceReferences
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Keywords
melanin
malignant tumor