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Renal carcinoma tend to develop in older animals.
Clinical signs may include haematuria and weight loss. Renal carcinoma usually develop at one pole of the kidney and form a well demarcated mass which compresses adjacent renal tissue. Grossly they may be grey or yellow with areas of haemorrhage or necrosis. . This dog presented with a large mass affecting one kidney. The mass is formed from irregular tubular structures lined by cuboidal epithelial cells.