Renal medicine, or nephrology, is a medical specialty concerned with the diagnosis and treatment of kidney diseases. The kidneys are located in the abdomen on either side of the spine and they filter out waste from your blood and make urine. It includes the management of patients with acute kidney injury or advanced chronic kidney disease. Kidney disease can be caused by inflammation, diabetes as well as high blood pressure. Conditions and disorders of the kidney include kidney stones, kidney failure and kidney cancer.