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A thyroid fine needle aspiration biopsy is a procedure that removes a small sample of tissue from your thyroid gland. Cells are removed through a small, hollow needle. The sample is sent to the lab for analysis.

A minimally invasive mitral valve replacement is a procedure to replace a poorly working mitral valve with an artificial valve. The mitral valve helps blood flow through the heart and out to the body. Your doctor will use an artificial valve to replace your poorly working mitral valve.

Magnetic resonance imaging (MRI) is a test that uses a large magnet, radio signals, and a computer to make images of organs and tissue in the body. In this case, the heart is imaged. MRI may be used instead of a CT scan when organs or soft tissues are being studied.

Magnetic resonance imaging (MRI) uses a large magnet, radiofrequencies, and a computer to make detailed images of organs and structures within the body, in this case, the brain and spine. MRI is used to help diagnose a health problem.

An abdominal X-ray may be done to check the area for causes of belly pain. It can also be done to find an object that has been swallowed or to look for a blockage or a hole in the intestine. Read on to learn what to expect before, during, and after this imaging test.

Different kinds of tests show different levels of cancer risk. Some tests may even help people who don't have a personal or family history of cancer. You can be tested by working with your doctor.

Your surgeon has decided that you'll receive regional anesthesia. This sheet tells you what to expect with this type of anesthesia.

In combat, you were under a lot of stress. Being brave is standard practice. Anxiety is a healthy response to stress. But too much anxiety can be a problem. When anxiety becomes such a big part of your life, it's an anxiety disorder.

Learn about the flu during pregnancy, including what to do if you come down with the flu and how to avoid infection.