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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Novos Aspectos Patol?gicos e Patogen?ticos da Hemat?ria Enzo?tica Bovina. / New Pathological and Pathogenetic Aspects of Enzo?tic Bovine Hematuria.

Oliveira, Lu?s Gustavo Picorelli de 28 January 2009 (has links)
Made available in DSpace on 2016-04-28T20:18:35Z (GMT). No. of bitstreams: 1 LUIS GUSTAVO PICORELLI DE OLIVEIRA 1-75.pdf: 8291753 bytes, checksum: d0e3e8919d70356d42c7098b6af1d1a4 (MD5) Previous issue date: 2009-01-28 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / Ninety bovine bladders, from a slaughterhouse from the district of Barra Mansa/RJ and from bovine necropsies in Pteridium arachnoideum invaded locations, were examined when associated with clinical signs as those found in bovine enzootic hematuria. A diffuse wrinkling of the bladder mucosa was found in 40% of the cases which was correlated to increased mucous normal irregularity, polyp proliferation, lamina propria thickening, fibrose and, in severe cases, urotelial carcinoma multicentric proliferation of endophitic growth. Papillary tumours were microscopically classified as urotelial carcinoma in 35% of cases and papiloma in 65%. In some cases, carcinoma and adenocarcinoma presented less commom differentiation patterns as intestinal, of Paneth cells, and a mesonefroid adenocarcinoma in the trigone area, which demonstrated bladder embryological origin influence on different types of lesions that were found. Mucosal hemorrhagic lesions occurred in 100% of the cases and were associated with vascular proliferation and lamina propria hemorrhage or, in sever cases, 77,4% of hemorrhagic elevations were correlated to hemangioma or hemangiosarcoma. At last, we have established a correlation between P. arachnoideum chronic poisoning lesions and ionizing radiation bladder alteration in humans. / Em um frigor?fico no munic?pio de Barra Mansa, RJ, e por ocasi?o de visitas a campo em regi?es infestadas pela Pteridium arachnoideum, foram coletadas 90 bexigas de bovinos que apresentavam sinais cl?nicos e ou les?es macrosc?picas compat?veis com o quadro de hemat?ria enzo?tica. As les?es encontradas tanto ao exame macrosc?pico quanto microsc?pico foram mais frequentes no corpo e na base da bexiga. ? macroscopia um enrugamento difuso da mucosa da bexiga foi observado em 40% dos casos, o que foi correlacionado ao aumento do pregueamento da mucosa, ? prolifera??o de p?lipos, ao espessamento da l?mina pr?pria, ? fibrose e, nos casos mais graves, ? prolifera??o multic?ntrica de carcinomas uroteliais com crescimento endof?tico. Tumores papiliformes foram classificados microscopicamente como carcinomas uroteliais em 35% dos casos e papilomas em 65%. Carcinomas e adenocarcinomas apresentaram, em alguns casos, diferencia??es consideradas pouco frequentes, como intestinal, em c?lulas de Paneth e em c?lulas claras. Um adenocarcinoma mesonefr?ide foi encontrado na posi??o do tr?gono, o que demonstra a influ?ncia da origem embriol?gica da bexiga sobre os tipos de les?es encontradas. Les?es hemorr?gicas na mucosa ocorreram em 100% dos casos, e estavam correlacionados a prolifera??es vasculares e hemorragias na l?mina pr?pria ou, nos casos mais graves, 77,4% das eleva??es hemorr?gicas foram correlacionadas a hemangiomas ou a hemangiossarcomas. Foi estabelecida uma identidade entre as les?es produzidas pela intoxica??o cr?nica por P. arachnoideum em bovinos e as altera??es provocadas na bexiga de seres humanos expostos a radioterapia ou ? radia??o ionizante ambiental.

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