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Learning Center
Heart cancer: Is there such a thing?
Although heart tumors do occur, the vast majority of them are noncancerous (benign).
HER2-positive breast cancer: What is it?
HER2-positive breast cancer tends to be more aggressive than other types of breast cancer. Treatments that target HER2 are very effective.
Gallbladder polyps: Can they be cancerous?
The size of gallbladder polyps can be a useful predictor of whether they're cancerous.
Foot swelling during air travel: A concern?
Swelling of the leg or foot while flying is common and usually harmless.
Flu shots for kids: Does my child need a flu shot?
Know the latest recommendations for children's flu vaccines.
Enterovirus D68 and parechovirus: How can I protect my child?
Enterovirus D68 and parechovirus infections can lead to serious illness among children. Know the symptoms and what you can do.
Discolored semen: What does it mean?
Find out what causes discolored semen.
Digestion: How long does it take?
Digestion takes about two to five days, depending on your system.
Did the definition of Alzheimer's disease change?
What the change in the research definition of Alzheimer's disease means for you.
Demyelinating disease: What can you do about it?
Learn the causes and types of these diseases that affect the protective covering of nerves, which include multiple sclerosis. Also learn how they're treated.
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