Quit-smoking basics
Learning Center
A1C test
Learn more about the preparation for and results of this common diabetes blood test.
Rheumatoid factor
Rheumatoid factor — This blood test can help diagnose autoimmune disorders such as rheumatoid arthritis, Sjogren syndrome and lupus.
Complete blood count (CBC)
Learn what to expect from having this common blood test, why it's done and how to prepare.
Double-outlet right ventricle
In this heart condition present at birth, two major blood vessels aren't attached to the heart in the usual positions. Learn how it's treated.
Quit-smoking products: Boost your chance of success
Many quit-smoking products are available and using one or more can greatly increase your chance of success. Check out your options.
STD testing: What's right for you?
Find out how your risk factors affect the types of tests you'll need for sexually transmitted infections (STIs).
Cancer blood tests: Lab tests used in cancer diagnosis
Blood tests used to help diagnose cancer include CBC and tumor marker tests. Other tests and procedures are needed to confirm a cancer diagnosis.
Smokeless tobacco products
Learn the risks of using products such as chewing tobacco, snuff and snus.
Doppler ultrasound: What is it used for?
A Doppler ultrasound measures blood flow and pressure in blood vessels.
Biopsy: Types of biopsy procedures used to diagnose cancer
Learn about the different ways of collecting suspicious cells to test in the lab to diagnose cancer.
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