Kidney Neoplasia

()Map URINARY SYSTEM (Map)

Renal carcinoma. Courtesy of T. Scase

• Primary renal tumours are uncommon and comprise less than 1 percent of total neoplams.
  • Renal adenomas are rare and are usually incidental findings.
  • Renal adenocarcinomas are the most common primary neoplasm in older dogs, cattle and sheep. Lesions are typically unilateral, friable, with local necrosis and haemorrhage. Metastasis to the lungs is common.
  • Nephroblastomas (Wilms' tumour) are embryonal tumours of mesenchymal origin. They are the most common primary renal tumour of pigs and chickens.
• Metastatic renal tumours include lymphosarcoma in the cat and haemangiosarcoma, malignant melanoma and mammary adenocarcinoma in the dog.