Fine needle aspiration in domestic animals: a retrospective study.

• Autor(a) principal: Bracarense, Ana Paula Frederico Rodrigues Loureiro
• Data de Publicação: 1997
• Outros Autores: Reis, Antônio Carlos Faria dos
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Semina. Ciências Agrárias (Online)
• Texto Completo: https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/4254
• topic: Fine needle aspiration; Cytology; Histopathology; Neoplasia.; Citologia aspirativa; Histopatologia; Neoplasias.

The aim of this work was to determine the efficacy of cytology for the diagnosis of malignancy and determination of its cellular origin in domestic animals. In this retrospective study, a comparison was made of fine needle aspiration and histological diagnoses of lesions from 498 animals. Cytological material was obtained by fine needle aspiration. Air-dried smears were stained by Giemsa or Wright stains. Tissues for histological examination were obtained by surgical biopsy or at necropsy, and were fixed in formalin and paraffin-embedded. Sections were stained routinely with haematoxylin and eosin. Other stains were eventually used. Diagnoses by the 2 methods were in agreement in 458 (92%) of the 498 cases. The lesions were classified as neoplasms of epithelial origin in 26,24% of the cases; 7,31% were neoplasms of mesenchymal origin and 37,64% were round cell tumors. Round cell tumors were classified as lymphomas, mast-cell tumors, histiocytomas, melanomas and transmissible venereal tumors (TVT). The results shows that fine needle aspiration have an accuracy of 92% and can supplement the clinician's diagnostic resources with a simple, quick and inexpensive technique.