Neoplasias em cães: um estudo epidemiológico do ano de 2019
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2023
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As neoplasias são das causas mais importantes de morte em cães, em todo o mundo, representando um desafio para toda a comunidade científica. A maioria é multifatorial e com uma epidemiologia complexa.
Este trabalho de dissertação teve como objetivo caracterizar a distribuição de tumores diagnosticados em cães em Portugal, no ano de 2019, utilizando como amostra todos os casos analisados por um laboratório nacional nesse ano.
Foram analisados retrospetivamente 2.032 relatórios de amostras histopatológicas, relativos ao ano de 2019, realizados no laboratório DNAtech. Destes, 1549 correspondiam a amostras de lesões neoplásicas em cães, em que 878 (57%) eram fêmeas. Os cães de raça pura (54%) predominaram, sendo dentro destes a raça Labrador Retriever a mais frequente (n=154/1549, 10%). Dos 1549 cães, 363 (23%) apresentavam múltiplos tumores, sendo a maioria benignos (n=1099, 54%). Os tumores epiteliais (TE) foram os mais frequentes (n=1106, 55%), seguindo-se os tumores mesenquimatosos (TM; n=512, 25%) e os tumores de células redondas (TCR; n=390, 19%). Os TE mais frequentes foram os adenomas mamários complexos (11%, n=120). Os lipomas representaram a maioria dos TM (n=114, 22%). Os mastocitomas representaram 54% (n=212) dos TCR. A pele e anexos (n=859, 44%), a glândula mamária (n=567,29%) e o aparelho digestivo (n=169, 8%) foram as topografias mais comuns.
Os estudos epidemiológicos criados a partir de registos oncológicos representam uma importante ferramenta na prevenção, diagnóstico e tratamento do cancro levando à criação de linhas de investigação na área oncológica.
Palavras-chave: cães; epidemiologia; registo oncológico; neoplasia; tumor.
Neoplasms are one of the most important causes of death in dogs, worldwide, representing a challenge for the entire scientific community. Most are multifactorial and with a complex epidemiology. This dissertation aimed to characterize the distribution of tumors diagnosed in dogs in Portugal in 2019, using as sample all cases analyzed by a national laboratory in that year. We retrospectively analysed 2032 reports of histopathological samples, concerning the year 2019, performed in the DNAtech laboratory. Of these, 1549 corresponded to samples of neoplasic lesions in dogs, of which 878 (57%) were females. Purebred dogs (54%) predominated, and within these, the Labrador Retriever breed was the most frequent (n=154/1549, 10%). Of the 1549 dogs, 363 (23%) had multiple tumours, most of which were benign (n=1099, 54%). Epithelial tumours (TE) were the most frequent (n=1106, 55%), followed by mesenchymal tumours (TM; n=512, 25%) and round cell tumours (TCR; n=390, 19%). The most frequent TE were complex breast adenomas (11%, n=120). Lipomas represented the majority of TMs (n=114, 22%). Mastocytomas represented 54% (n=212) of TCRs. The skin and appendages (n=859, 44%), the mammary gland (n=567.29%) and the digestive tract were the most common locations. Epidemiological studies created from oncological registries represent an important tool in the prevention, diagnosis and treatment of cancer, leading to the creation of lines of research in the oncology field. Key words: dogs; epidemiology; oncological register; neoplasy; tumour.
Neoplasms are one of the most important causes of death in dogs, worldwide, representing a challenge for the entire scientific community. Most are multifactorial and with a complex epidemiology. This dissertation aimed to characterize the distribution of tumors diagnosed in dogs in Portugal in 2019, using as sample all cases analyzed by a national laboratory in that year. We retrospectively analysed 2032 reports of histopathological samples, concerning the year 2019, performed in the DNAtech laboratory. Of these, 1549 corresponded to samples of neoplasic lesions in dogs, of which 878 (57%) were females. Purebred dogs (54%) predominated, and within these, the Labrador Retriever breed was the most frequent (n=154/1549, 10%). Of the 1549 dogs, 363 (23%) had multiple tumours, most of which were benign (n=1099, 54%). Epithelial tumours (TE) were the most frequent (n=1106, 55%), followed by mesenchymal tumours (TM; n=512, 25%) and round cell tumours (TCR; n=390, 19%). The most frequent TE were complex breast adenomas (11%, n=120). Lipomas represented the majority of TMs (n=114, 22%). Mastocytomas represented 54% (n=212) of TCRs. The skin and appendages (n=859, 44%), the mammary gland (n=567.29%) and the digestive tract were the most common locations. Epidemiological studies created from oncological registries represent an important tool in the prevention, diagnosis and treatment of cancer, leading to the creation of lines of research in the oncology field. Key words: dogs; epidemiology; oncological register; neoplasy; tumour.
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Orientação: Mariana Batista
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MESTRADO INTEGRADO EM MEDICINA VETERINÁRIA, MEDICINA VETERINÁRIA, VETERINARY MEDICINE, VETERINÁRIA, CANÍDEOS, CANIDS, CÃES, DOGS, EPIDEMIOLOGIA, EPIDEMIOLOGY, NEOPLASIAS, NEOPLASMS