In cardiac catheterization (often called cardiac cath), a very small hollow tube, or catheter, is advanced from a blood vessel in the groin, arm, or neck through the aorta into the heart. Once it is in place, several diagnostic and treatment procedures can be done using catheterization.

A pelvic ultrasound is a scan that looks at the organs and structures in your pelvic area. Read on to learn details about what to expect before, during, and after this scan.

A mastectomy is surgery to remove a breast. It is part of treatment for breast cancer. Here's what you need to know about this procedure.

A kidney ultrasound is an imaging test that uses sound waves to look at your kidneys. It can check the size, shape, and location of your kidneys. It also lets your healthcare provider see how well blood is flowing in your kidneys.

A biopsy is done to remove tissue or cells from the body for exam under a microscope. The tissue sample is removed with a needle to check for cancer or other abnormal cells. It also helps check how well the kidney is working.

A liver transplant is surgery to replace a diseased liver with a healthy liver from another person. Read on to learn more.

Detailed information about peak flow measurement, a quick test to measure air flowing out of the lungs.

A lung scan is an imaging test to look at your lungs and help diagnose certain lung problems. A lung scan may also be used to see how well treatment is working.

Learn more about osteoarthritis, the most common type of arthritis, by taking this quiz.

Answer this one: Depression peaks at certain life stages. People in which group are likely to experience it most often?