👉 Lithonephria is a medical term that refers to an abnormal growth of the kidney. It occurs when the kidneys are unable to properly filter waste and excess fluid from the blood, which can lead to swelling and pain in the lower body. This condition is usually caused by a blockage or inflammation in the renal artery, which supplies blood to the kidneys. In severe cases, it may require medical intervention such as surgery or medications to stop the growth of the kidney.