Fitness basics
Learning Center
Chiari malformation
Learn about this brain condition in which brain tissue extends into the spinal canal.
Metachromatic leukodystrophy
This rare genetic disorder causes fatty substances (sulfatides) to build up in your brain and nervous system, causing progressive loss of nerve function.
Epilepsy
Learn about this condition that causes seizures. Find out which symptoms are associated with different types of seizures and how they're treated.
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.
Cerebral palsy
Learn about this group of conditions that affect movement. It's caused by damage to the developing brain, usually before birth.
Bicuspid aortic valve
This condition, present at birth, affects the valve between the lower left heart chamber and the body's main artery. Know the symptoms and treatment.
Pulmonary atresia with ventricular septal defect
This congenital heart defect affects the valve between the heart and lungs and includes a hole in the heart. Learn the symptoms and how it’s treated.
Aortic valve disease
Learn more about diseases that affect the valve between the heart's main pumping chamber and the body's main artery.
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.
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.
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