Kidneys are two reddish-brown bean-shaped organs about the size of a fist located at the posterior side on either side of the spine, just below the ribcage. Their function is to filter blood to remove impurities, excess minerals and salts and extra water. Kidneys also produce hormones that control blood pressure and affect red blood cell production.
Renal cancer or kidney cancer originates from cells lining the proximal tubules of the kidney. Kidneys are made up of numerous nephrons, which are the microscopic structural and functional units of the kidneys.
The proximal tubule is a part of these nephrons which plays a vital role in kidney functions like absorption of glucose, amino acids and other solutes from blood and ultimately helps in the formation of urine that removes toxins from our body.