Fitness basics
Learning Center
Klinefelter syndrome
This genetic disorder occurs when a male is born with an extra copy of the X chromosome and may result in low testosterone production and infertility.
Primary lateral sclerosis (PLS)
This motor neuron disease causes nerves within the brain to slowly break down. It causes muscle weakness primarily in the legs, arms and tongue.
Craniopharyngioma
Learn more about this noncancerous tumor that forms near the brain's pituitary gland, including diagnosis and treatment options.
Concussion testing and screening tools
These screening tools help measure brain function after head trauma and help athletes at risk of head injuries.
Cochlear implants
This electronic device improves hearing in people who have severe hearing loss from inner ear damage.
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.
Feminizing hormone therapy
Find out more about feminizing hormonal treatment used to better align the body with a person's gender identity.
Masculinizing hormone therapy
Find out more about masculinizing hormonal treatment used to better align the body with a person's gender identity.
Radiation therapy
Radiation therapy is a common means of treating many types of cancer. Find out what to expect during your radiation therapy treatment.
Concussion in children: What are the symptoms?
Whether your child's concussion is mild or severe, allow time to recover.
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