The urinary bladder, trigone and pelvic urethra demonstrated normal wall thicknesses with anechoic urine and normal tone. No uroliths or sediment were visualized. No evidence of inflammatory or neoplastic changes were noted. The ureters were not visible and considered normal. The testicles were uniform without evident pathology. The prostate demonstrated only micronodular changes, and measured 2.77 cm in width. The kidneys in this patient were bilaterally swollen and hypervascular, which is consistent with aggressive, acute disease. The right kidney measured 6.15 x 3.15 cm. There was a complete lack of corticomedullary definition with hypertrophy, micronodular cortical changes and concurrent pyelectasia. Pyelectasia in the right kidney measured 0.25 cm. The patient is on fluid therapy, so the pyelectasia may be caused by fluid and diuresis. Perinephric inflammatory pattern was noted in the surrounding fat. Retroperitoneal space on the left side contained a hypoechoic mass type structure, blood clot or tumor tissue invasion within the sublumbar space that extended from the caudal pole of the left kidney to the level of the urinary bladder. The left kidney measured 5.9 x 3.98 cm with complete loss of the medullary structure, hypervascular cortex and loss of definition at the corticomedullary junction.