Weight-loss basics
Learning Center
Stool DNA test
Learn about this noninvasive colon cancer screening test that can detect DNA changes in cells collected from a stool sample.
Solutions for weight-loss setbacks
Everyone who successfully makes changes in his or her life has experienced setbacks. It's better to expect them and plan for dealing with them. Identifying potential roadblocks — a big holiday meal or an office party, for example — and brainstorming strategies to overcome them can help you stay on course with your weight-loss goals.
Small cell, large cell cancer: What this means
Cancer cells are classified by how they look under a microscope. Learn common terms used to describe cancer cells.
Slow metabolism: Is it to blame for weight gain?
Is a slow metabolism the reason for your weight gain? Or is something else going on?
Slide show: Blood sugar testing
Blood sugar testing is an essential part of diabetes care. See how it's done.
Sentinel node biopsy
Learn what to expect during this procedure to remove lymph nodes for testing. The results can show whether cancer has spread.
Sed rate (erythrocyte sedimentation rate)
Sed rate is a blood test that can reveal inflammatory activity in your body. It's often used to help diagnose conditions affecting your joints or muscles.
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).
Rheumatoid factor
Rheumatoid factor — This blood test can help diagnose autoimmune disorders such as rheumatoid arthritis, Sjogren syndrome and lupus.
Reactive airway disease: Is it asthma?
Reactive airway disease is a general term that doesn't indicate a specific diagnosis.
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