Teen health
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Congenital adrenal hyperplasia
This group of inherited genetic conditions limits the adrenal glands' ability to make certain vital hormones.
Vaginal agenesis
In this rare condition that occurs before birth, the vagina doesn't develop and the uterus may only develop partially or not at all. Learn about treatment.
Niemann-Pick disease
A condition passed down in families that affects how the body breaks down and uses fats. Fat buildup in cells damages the nerves, brain and other organs.
Down syndrome
Down syndrome is a genetic disorder caused when abnormal cell division results in extra genetic material from chromosome 21.
Toxoplasmosis
Learn about symptoms, causes, treatment and prevention of this parasitic infection that can cause severe disease.
Fetal alcohol syndrome
Fetal alcohol syndrome results from alcohol exposure during the mother's pregnancy, causing irreversible brain damage and growth problems in the child.
Cavernous malformations
Understand the symptoms that may occur when blood vessels in the brain or spinal cord are tightly packed and contain slow-moving blood.
Epidermolysis bullosa
Learn about a rare inherited disease that often shows up in infancy and causes fragile, blistering skin on the palms and feet. Severe disease may be fatal.
Hepatitis B
This highly contagious virus can cause long-lasting problems if it goes untreated. Learn about the symptoms, treatment and prevention of this serious liver infection.
Ambiguous genitalia
Learn about causes and treatment of ambiguous genitalia, a rare disorder of sex development in which a baby's external genitals are not clearly male or female.
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