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Provedor de dados:  Arq. Bras. Med. Vet. Zootec.
País:  Brazil
Título:  Association of nucleolar organizing regions and Ki-67 expression with recurrence rate of hair follicle tumor in dogs
Autores:  Souza,P.C.
Data:  2008-10-01
Ano:  2008
Palavras-chave:  Dog
Hair follicle
Resumo:  Mitotic index, nuclear diameter, number of nucleolar organizing regions, and Ki-67 expression, in hair follicle tumors of 82 dogs were evaluated. Tissue specimens were used to prepare sections for histological staining for number of nucleolar organizing region and immunohistochemical staining for Ki-67. Tumors were classified as trichoblastoma (n=32), benign trichoepithelioma (n=30), pilomatricoma (n=7), malignant trichoepithelioma (n=6), infundibular keratinizing acanthoma (n=5), and tricholemmoma (n=2). Head, dorsum, and limbs were the most affected sites. Malignant trichoepithelioma presented significantly higher mitotic index, number of nucleolar organizing regions and Ki-67 expression. Regarding benign neoplasms, trichoblastoma presented significantly higher mitotic index and number of nucleolar organizing regions. Ki-67 expression did not differ among hair follicle benign neoplasms. Recurrence was only observed in two cases, with one benign trichoepithelioma and one malignant trichoepithelioma. In the two cases, nodules have not been removed with clean surgical margin. It was concluded that in benign neoplasms of hair follicles, the number of nucleolar organizing regions and Ki-67 expression were significantly smaller than in malignant neoplasm. Clean surgical margins are suggested to be more responsible to tumor recurrences than the number of nucleolar organizing regions, expression of Ki-67, and the mitotic index.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Editor:  Universidade Federal de Minas Gerais, Escola de Veterinária
Relação:  10.1590/S0102-09352008000500006
Formato:  text/html
Fonte:  Arquivo Brasileiro de Medicina Veterinária e Zootecnia v.60 n.5 2008
Direitos:  info:eu-repo/semantics/openAccess

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