Lesões do sistema urinário em 1.063 cães1

ABSTRACT.- Inkelmann M.A., Kommers G.D., Trost M.E., Barros C.S.L., Fighera R.A., Irigoyen L.F. & Silveira I.P. 2012. [ Lesions of the urinary system in 1,063 dogs. ] Lesoes do siste-ma urinario em 1.063 caes. Pesquisa Veterinaria Brasileira 32(8):761-771. Laboratorio de Patologia Veterinaria, Departamento de Patologia, Universidade Federal de Santa Maria, Camobi, Santa Maria, RS 97105-900, Brazil. E-mail: glaukommers@yahoo.comThe aim of this study was to determine the prevalence, epidemiology, clinical signii-cance, and possible associated causes of the urinary system lesions in dogs necropsied be-tween January 1999 and December 2010 at the Laboratorio de Patologia Veterinaria of the Universidade Federal de Santa Maria (LPV-UFSM). To accomplish this, the necropsy reports were analyzed retrospectively. In this time frame, 3,189 dogs were necropsied and about 30% had lesions in the urinary system. In most of the dogs (79.1%), lesions were single and in about 21% they were multiple, totalizing 1,373 lesions. Out of them, 1,014 (73.8%) were observed in the kidney and 359 (26.2%) were in the lower urinary tract (LUT). One third of the lesions in the urinary system were causes of spontaneous death or reason for euthanasia (SD/EUTH) of the affected dogs. The other two third of the lesions were considered incidental indings. The main renal lesions diagnosed, in descending order of prevalence, were: tubulointerstitial nephritis, infarct, granulomatous nephritis (parasita-ry), glomerulonephritis, metastatic/multicentric neoplasms, pyelonephritis/pyelitis, and hydronephrosis. The main LUT lesions, in descending order of prevalence, were: cystitis, presence of viral inclusions bodies (morbillivirus), urolithiasis, urinary bladder dilatation, urinary bladder rupture (with uroperitoneum), and metastatic/multicentric neoplasms. Epidemiological aspects such as gender, breed, and age of affected dogs had expressive variations according to the type of lesion diagnosed. Uremia was observed in a signiicant number of cases of SD/EUTH and was mostly due to renal lesions.