Achados imaginológicos e clínico-patológicos de carcinoma de células transicionais em trígono vesical de um cão: relato de caso.

Abstract

The transitional cell carcinoma (CCT) is a tumor type of epithelial origin that affects the urinary vesicle, more precisely the region of the bladder trigone, being the most found among the neoplasms that affect the urinary tract, however, it still has low casuistry in relation to to the total number of neoplasms identified in dogs. This work aims to report a case of CCT in a dog, focusing on ultrasound findings and changes secondary to the tumor. A 10-year-old male, poodle, male, was seen at the veterinary hospital with bladder tenesmus and episodes of urinary incontinence. Complementary tests were requested: blood count, serum biochemistry, radiography, ultrasound, urinalysis and cytology. Biochemical examination showed an increase in serum urea and creatinine levels. In the ultrasound examination, a focal thickening of the urinary vesicle wall was detected, with loss of stratification of layers in the region of the bladder triangle, positive on the color Doppler exam, suggestive of primary or metastatic neoplasia. Bilateral renal changes were also observed during the examination: loss of relationship and definition of the corticomedullary junction, increased echogenicity of the remaining cortical, significant pyelectasis, presence of accumulation of enough anechoic content in the renal capsule and dilated ureters throughout, suggesting hydronephrosis and hydroureter. Urine was collected through bladder catheterization for urinalysis and cytological examination, in which a hypercellularity with neoplastic characteristics was found, being diagnosed by cytology as transitional cell carcinoma. Even in the case of a tumor with low response to therapy, treatment was prescribed and carried out, and the dog was accompanied by complementary exams to monitor its condition for a few months. With the conclusive diagnosis of the neoplastic process, the institution of the most appropriate therapeutic approach for the case became viable, thus increasing the patient's survival.