Kidney dysplasia, also known as multicystic dysplastic kidney (MCDK), is when the internal structures of one or both kidneys do not form properly during early development.[1] If one kidney is affected, often there are no symptoms, though in some cases the kidney enlarges and causes pain.[1] Complications can include hydronephrosis, high blood pressure, urinary tract infections (UTI), or kidney failure.[1] If both kidneys are severely affected the child may die around the time of birth.[1]