This exercise helps strengthen your quads.

Patellofemoral syndrome is a condition that causes pain on the front of the knee. Learn about causes, symptoms, treatment, and possible complications.

Norovirus is a virus that can infect the stomach and intestines. The virus spreads easily in areas of close human contact, such as schools and cruise ships.

This exercise helps develop strength in your shoulder.

An epididymectomy is a surgery to remove the epididymis. An epididymis is a tube that holds sperm. You may need this surgery if you have an infection, tumor, or cyst.

Endoscopic endonasal surgery is a type of procedure to treat problems, such as a tumor, in the front or bottom of the brain or top of the spinal cord.

Endovascular repair is a type of treatment for an abdominal aortic aneurysm (AAA). An AAA is a bulge in the wall of the large artery below your heart.

Embolectomy is surgery to remove a blood clot (embolus) from one of your blood vessels. It is often an emergency procedure.

Electronystagmography is a test that measures the movements of your eyes and the muscles that control them. It's used to test for balance disorders.

Cardioversion is a procedure that is done to return your heartbeat to a normal rhythm. It's done when the heart is beating very fast or has an irregular beat.