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Electronystagmography (ENG) is a test used to evaluate vertigo and certain other hearing and vision disorders. For this test, electrodes are placed above and below the eye. They record the electrical activity of the muscles that control eye movement.

A cerebral arteriogram is a catheter-based exam of the blood vessels in the brain, head, and neck.

An appendectomy is surgery to remove the appendix when it is infected. This condition is called appendicitis. Appendectomy is a common emergency surgery.

A cholecystectomy is surgery to remove your gallbladder.

Cystography is an imaging test that can help diagnose problems in your bladder. It uses X-rays. They may be X-ray pictures or fluoroscopy, a kind of X-ray "movie."

A kidney transplant is a surgery done to replace a diseased or injured kidney with a healthy kidney from a donor. The kidney may come from a deceased donor or from a living donor.

An angiogram is a type of imaging test. It uses X-rays to look at your blood vessels. An abdominal angiogram looks at the blood vessels in your belly (abdomen). Read on to learn why it's done and what to expect before, during, and after this test.

Cystometry is a test used to look for problems with the filling and emptying of the bladder. The bladder is part of the urinary tract.

Lithotripsy is a procedure used to treat kidney stones that are too large to pass through the urinary tract. It works by sending focused ultrasound energy or shock waves directly to the stone. The shock waves break a large stone into smaller stones that will pass through the urinary system.