Renal experts explain that simple kidney cysts are common and benign (not cancerous). For as-yet-undiscovered reasons, people who develop these cysts often have high blood pressure, too. Simple kidney cysts are not inherited.

Most cause no symptoms and are harmless to the kidney. Treatment may be needed if a cyst becomes infected or enlarged. Nearly 30 percent of people over age 70 have at least one simple kidney cyst, according to the National Institute of Diabetes and Digestive and Kidney Diseases.

Medical Mailbox supplements the advice of your healthcare provider, whom you should consult for personal medical problems.

Are Kidney Cysts Harmful? The Saturday Evening Post