Kidney cancer, also known as renal cancer, is a disease that causes the kidney cells to become cancerous or malignant. Most kidney cancers first appear along the lining of the kidney’s tiny tubes. This is known as renal cell carcinoma. Fortunately, in most cases, kidney cancers are detected before it spreads to other organs. This increases the chances of successful treatment. However, in some people, kidney tumors can grow quite large before they are detected. What causes kidney cancer? In most cases, kidney cancer occurs in people above the age of 40; but, there are exceptions to this rule. The…