Fitness basics
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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.
Mesenteric lymphadenitis
This condition involves swollen lymph nodes in the membrane that connects the bowel to the abdominal wall. It usually affects children and teens.
Congenital adrenal hyperplasia
This group of inherited genetic conditions limits the adrenal glands' ability to make certain vital hormones.
Aortic valve disease
Learn more about diseases that affect the valve between the heart's main pumping chamber and the body's main artery.
Atrial septal defect (ASD)
This heart problem that is present at birth causes a hole between the heart's upper chambers. It can be treated.
Measles vaccine: Can I get the measles if I've already been vaccinated?
Is it possible to get measles from someone else if you've been vaccinated?
Mayo Clinic Minute: How to treat poison ivy rash
Learn tips to ease the intense itching of poison ivy rash, including calamine lotion, oatmeal baths and cool compresses.
Rhabdomyosarcoma
This rare soft tissue cancer affects children more often than adults. Treatment may include surgery, chemotherapy and radiation therapy.
Reye's syndrome
Learn more about the causes and treatment of Reye's syndrome, a rare but serious condition causing swelling in the liver and brain.
Migraine
Find out about painful migraines that can last hours to days. Also can cause nausea and vomiting and reacting to light and sound.
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