Canine Kidney Tumor Study Guide

Overview and Clinical Importance

Primary renal neoplasia is uncommon in dogs, accounting for less than 1.7% of all canine tumors. However, these tumors are clinically significant due to their highly malignant nature, with over 90% being malignant. The majority are epithelial in origin, with renal cell carcinoma (RCC) being the most common primary renal tumor in dogs. Understanding the classification, diagnosis, and management of canine kidney tumors is essential for NAVLE success, particularly recognizing breed predispositions and the critical role of early surgical intervention.

Epidemiology and Risk Factors

Patient Demographics

Primary renal tumors predominantly affect middle-aged to older dogs, with a mean age of 8.1 years (range 1-17 years). There is a male predisposition, with males being affected approximately 50% more commonly than females. Medium to large breed dogs (mean weight 24.9 kg) are most commonly affected. The exception is nephroblastoma, which typically affects dogs less than 12 months of age.

Patient Demographics by Tumor Type

Classification of Canine Renal Tumors

Renal tumors can be classified by their tissue of origin and whether they are primary, metastatic, or multicentric. Over 85% of primary renal tumors are epithelial in origin.