Tween and teen health
Learning Center
Adenomyosis
Displaced endometrial tissue from adenomyosis can cause an enlarged uterus and painful, heavy periods.
Addison's disease
Learn about this rare but serious disorder of the adrenal glands that's treated by replacing needed hormones.
Add antioxidants to your diet
Antioxidants may play a role in preventing heart disease, cancer and other diseases. See which foods are abundant in antioxidants.
Acute sinusitis: Do over-the-counter treatments help?
Over-the-counter drugs may provide some relief from the symptoms of acute sinusitis.
Acute sinusitis
Learn the latest ways to treat and prevent the stuffy nose and head pain that can come with this condition.
Acute myelogenous leukemia
Learn about this cancer that forms in the bone and bone marrow. Treatments include medications and bone marrow transplant.
Acute lymphocytic leukemia
Learn about this cancer that forms in the blood and bone marrow. Treatments include medications and bone marrow transplant.
Acute liver failure
A rapid loss of liver function can occur in people who don't even have liver disease. Find out about symptoms, treatment and prevention of this serious medical emergency.
Acute kidney failure
Learn what happens when the kidneys suddenly stop working, as well as what causes this condition and how it's treated.
Acute coronary syndrome
Know the symptoms, causes and treatment of this heart condition. The term refers to many conditions that cause sudden, low blood flow to the heart.
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