Hematuria and extreme neutrophilic leukocytosis in a dog with renal tubular carcinoma.

Renal tubular carcinoma was believed responsible for hematuria and extreme leukocytosis in a dog. Other paraneoplastic syndromes possibly associated with this neoplasm included fever, thoracolumbar hyperesthesia, and anemia attributable to myelophthisis. All clinical and clinicopathologic abnormalities resolved after unilateral nephrectomy. Neutrophil cytochemical stains were used to differentiate leukemoid reaction from myelocytic leukemia as the cause of the leukocytosis. The extreme leukocytosis in this dog may have been leukemoid reaction caused by production of colony-stimulating factor by the renal tubular carcinoma.