Coloração de Feulgen aplicada à histomorfometria nuclear com ImageJ em subtipos de carcinoma mamário canino

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Resumo

Resumo: A histomorfometria é uma ferramenta importante no diagnóstico e prognóstico do câncer de mama, permitindo a quantificação de características microscópicas relacionadas à agressividade tumoral. Este estudo teve como objetivo padronizar a coloração de Feulgen para análise morfométrica nuclear e comparar as medidas nucleares obtidas entre subtipos de carcinoma mamário canino. Lâminas histológicas com cortes em microarranjos teciduais (TMA) dos diagnósticos de carcinoma tubulopapilar (CTP), carcinoma complexo (CC) e carcinoma sólido (CS) foram coradas pelo método de Feulgen. Cinco campos aleatórios por amostra de TMA foram fotografados em aumento de 400×, e a morfometria nuclear foi realizada no software ImageJ, utilizando a ferramenta Threshold. O subtipo CS apresentou área nuclear (85,40 µm² ± 0,3159) e perímetro nuclear (48,33 µm ± 0,1217) significativamente maiores em comparação aos subtipos CTP e CC (P < 0,0001). Esses resultados indicam que o CS, neoplasia de alto grau de malignidade, apresenta maiores dimensões nucleares. A área e o perímetro mostraram-se parâmetros mais confiáveis para a comparação entre diferentes subtipos, enquanto a circularidade auxiliou na diferenciação dos graus de malignidade dentro de um mesmo subtipo. A coloração de Feulgen demonstrou elevada eficiência para a histomorfometria nuclear, permitindo a delimitação precisa dos núcleos e reduzindo a subjetividade na avaliação quantitativa.
Palavras-chave: Cão; coloração histoquímica; grau de malignidade; neoplasia; morfometria nuclear.

Keywords: Carcinoma, dog, neoplasms, nuclear morphology.

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Publicado

2025-10-28

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RODRIGUES, Arthur Perillo; CARVALHO, Mara Taís de; FERREIRA, Hugo Henrique; MENEZES, Liliana Borges de; MIGUEL, Marina Pacheco. Coloração de Feulgen aplicada à histomorfometria nuclear com ImageJ em subtipos de carcinoma mamário canino. Ciência Animal Brasileira / Brazilian Animal Science, Goiânia, v. 26, 2025. Disponível em: https://revistas.ufg.br/vet/article/view/82640. Acesso em: 5 dez. 2025.

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MEDICINA VETERINÁRIA

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