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Learning Center
Down syndrome
Down syndrome is a genetic disorder caused when abnormal cell division results in extra genetic material from chromosome 21.
Ductal carcinoma in situ (DCIS)
Noninvasive breast cancer often has no symptoms. Find out about the causes, diagnosis and treatment of this form of breast cancer.
Dwarfism
Very short stature of 4 feet 10 inches or less that results from a genetic or medical condition is considered dwarfism. Learn about causes and treatment.
Ear infection (middle ear)
These usually get better on their own, but sometimes medicine is needed. Find out more about how doctors diagnose and treat this common ear condition.
Ebstein anomaly
In this rare heart defect, the tricuspid heart valve didn't form properly. This can affect the heart's ability to pump blood. Know the risks and symptoms.
Ectopic pregnancy
Ectopic pregnancy occurs outside the uterus, threatening the mother's life. It can't continue normally. But swift treatment can prevent deadly blood loss.
Ehlers-Danlos syndrome
Learn about these complex genetic disorders that cause problems with connective tissue in the skin, joints and blood vessel walls.
Ehrlichiosis and anaplasmosis
Learn how to prevent and treat the tick-borne diseases ehrlichiosis and anaplasmosis.
Eisenmenger syndrome
This complication of an unrepaired congenital heart defect needs to be watched closely. Learn how treatment can help manage symptoms.
Embryonal tumors
Learn about these malignant brain tumors that happen most often in babies and young children. Treatments include surgery, radiation therapy and chemotherapy.
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