Aerobic exercise
Learning Center
Strength training: OK for kids?
It's good for kids to build strength as long as form and safety come first.
Osteosarcoma
Learn about the symptoms and causes of this bone cancer that happens most often in children. Find out about treatments, including limb-sparing operations.
Aortic valve repair and aortic valve replacement
These types of heart valve surgeries are done to treat aortic valve disease, including aortic stenosis and aortic regurgitation.
Tricuspid valve repair and tricuspid valve replacement
These heart surgeries treat tricuspid valve regurgitation and stenosis and Ebstein anomaly, a type of congenital heart defect. Learn how they're done.
Radiation therapy
Radiation therapy is a common means of treating many types of cancer. Find out what to expect during your radiation therapy treatment.
Myocarditis
Learn about the diagnosis and treatment of this inflammation of the heart muscle that can reduce the heart's ability to pump blood.
Tuberous sclerosis
This uncommon genetic disorder causes tumors that are not cancer. These tumors are unexpected overgrowths of tissue in different parts of the body.
Congenital myasthenic syndromes
These rare hereditary conditions result in a problem in nerve stimulation, causing muscle weakness that worsens with physical activity.
Types of dermatitis
Learn to identify types of dermatitis by how the skin looks. Examples include atopic dermatitis, contact dermatitis and seborrheic dermatitis.
How you hear
Your ears enable you to gather and interpret sounds from the world around you.
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