Changes

[[Image:renal carcinoma.jpg|right|thumb|125px|<small><center>'''Renal carcinoma''' <br> T. Scase University of Cambridge</center></small>]]

[[Image:renal carcinoma.jpg|right|thumb|125px|<small><center>'''Renal carcinoma''' <br> T. Scase University of Cambridge</center></small>]]

*'''Primary renal tumours''' are uncommon and comprise less than 1 percent of total neoplams.   

*'''Primary renal tumours''' are uncommon and comprise less than 1 percent of total neoplasms.   

**Renal adenomas are rare and are usually incidental findings.

**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.   

**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.   

**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.

*'''Metastatic renal tumours''' include lymphosarcoma in the cat and haemangiosarcoma, malignant melanoma and mammary adenocarcinoma in the dog.