Breast-conserving surgery (BCS) is sometimes called a lumpectomy or a partial mastectomy. It may be done as part of a treatment plan for breast cancer. With BCS, only the part of the breast that has cancer is removed.

A sigmoidoscopy is a diagnostic test to check the lower part of your colon or large intestine (the sigmoid colon). This part of your colon is close to your rectum and anus.

A sinus X-ray is an imaging test that uses X-rays to look at your sinuses. The sinuses are air-filled pockets (cavities) near your nasal passage.

X-rays use invisible electromagnetic energy beams to make images of internal tissues, bones, and organs on film. Standard X-rays are done for many reasons, including diagnosing tumors or bone injuries.

A sleep study is a number of tests done at the same time during sleep. The tests measure specific sleep characteristics and help to diagnose sleep disorders. Read on to learn what to expect.

Myocardial perfusion is an imaging test. It's also called a nuclear stress test. Its done to show how well blood flows through the heart muscle. It also shows how well the heart muscle is pumping.