Lymphadenopathy is swelling of the lymph nodes. It is very common. The lymph nodes often get larger during a viral or bacterial infection.

Percutaneous balloon pericardiotomy (PBP) is a procedure to drain extra fluid from the sac around your heart. It's done with a long, thin tube (catheter) that has a small balloon attached. A small hole is made in the sac. Fluid is then drained out through the tube.

This is a type of surgery to replace a damaged hip joint. The surgery is done by an orthopedic surgeon.

Ankle replacement surgery is a procedure to treat arthritis of the ankle joint. The damaged ankle joint is replaced with an artificial implant.

A pericardial window is a surgery done on the sac around the heart. A small part of the sac is removed to let extra fluid drain from the sac.

Viscosupplementation is a treatment that can help ease arthritis symptoms. It's done by injecting hyaluronic acid into a joint. It's most often done in the knee. It can help reduce pain and swelling.

Aniridia means lack of an iris. It is a rare disorder in which the iris of the eye is partly or completely missing.

Diabetic ketoacidosis (DKA) is a serious problem that can happen in people with diabetes. If you have the symptoms of DKA, get medical help right away.

A vagus nerve stimulator (VNS) is a device that can help prevent seizures. It can also treat depression. Read on to learn more about how this device works.

Varicocele embolization is a procedure to treat an enlarged vein in the scrotum. Varicoceles often form during puberty. Learn about how the procedure is done.