Teen health
Learning Center
Conjoined twins
If an early embryo only partially separates and two babies develop, they remain physically connected — most often at the chest, abdomen or pelvis.
MCAD deficiency
This inherited genetic disorder prevents the breakdown of certain fats needed for energy, leading to dangerously low blood sugar levels if not treated.
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.
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