Kidney cancer, also known as renal cell carcinoma, is a type of cancer that starts in the cells of the kidney. The kidneys are two bean-shaped organs located in the lower back, one on each side of the spine. They are responsible for filtering waste products from the blood and producing urine.
Kidney cancer occurs when cells in the kidney grow and divide uncontrollably, forming a mass or tumor. This tumor can interfere with the normal functioning of the kidney, and in some cases, may spread to other parts of the body.