Kidney cancer occurs when a malignant tumor forms in the tissue of the kidney. The kidneys are a pair of bean-shaped organs located on either side of the spine, protected by the lower ribcage. Their main function is to filter blood and remove excess water, salt and waste from the body. Although the body has two kidneys, only part of one kidney is necessary to function.
Obesity, smoking, kidney dialysis and high blood pressure may increase the risk of kidney cancer. A family history of kidney cancer or kidney disease may also increase risk. According to the American Cancer Society, about 73,820 people will be diagnosed with kidney cancer in the United States in 2019. Men have a higher risk of developing kidney cancer than women.
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