Pathology of the urinary system

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NEOPLASTIC DISEASES

 

 

   ∙ 

primary tumors of urinary tract are rare: 

   - 

bladder tumors > renal tumors; the reason for this may be the prolonged exposure of the 

bladder mucosa to urinary carcinogens; 

   - 

dogs > cats > other species. 

 

   ∙ 

carcinogen may be involved in some cases, e.g. aromatic hydrocarbons, aniline dyes, tryptophan 

metabolites; 

   - 

in dogs, occurrence of transitional cell carcinoma of the bladder has been associated with 

exposure to flea and tick insecticide dips (but not shampoos), particularly in overweight 

animals; 

   - 

in cattle, enzootic hematuria, caused by prolonged ingestion of bracken fern in combination 

with infection by bovine papillomavirus type 2, is associated with a variety of epithelial and 

mesenchymal neoplasms.