A happy 10-year-old neutered male Yorkie-Poodle was presented due to the owner seeing bloody urine (hematuria) in the snow. Ultrasound of the abdomen revealed a proliferative mass arising and destroying the left kidney. The right kidney was normal and renal values were normal as well (only 25% of the kidney function is necessary to maintain normal values). The rest of the abdomen and chest were without lesions. The left kidney was resected at surgery and submitted for histopathology. Postsurgical renal values continued as normal and the dog was able to return home the next day.

The histopathology revealed the mass to be a renal adenocarcinoma.

Healthy kidney (right kidney)

Left kidney with proliferative mass

The above 3 photos show the resected kidney with the cancerous mass