Tween and teen health
Learning Center
DiGeorge syndrome (22q11.2 deletion syndrome)
This condition is due to missing part of chromosome 22. It may cause heart issues, thyroid problems, cleft palate, lower immunity and other health problems.
Thrombocytopenia (low platelet count)
Thrombocytopenia — Comprehensive overview covers symptoms, causes, treatment of a low platelet count.
Tongue-tie (ankyloglossia)
With tongue-tie (ankyloglossia), a band of tissue (frenulum) tethers the tongue, restricting the range of motion. Learn about symptoms and treatment.
Pulmonary atresia with intact ventricular septum
Also called PA/IVS, this rare congenital heart defect is diagnosed at or shortly after birth. Learn the symptoms and how it's treated.
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.
Arteriovenous malformation
In this condition, a tangle of blood vessels affects the flow of blood and oxygen. Treatment can help.
Multisystem inflammatory syndrome in children (MIS-C) and COVID-19
Learn about symptoms of MIS-C, a serious condition linked to coronavirus disease 2019 (COVID-19). Get help fast if your child shows any signs.
Diarrhea
Learn more about what causes this common, unpleasant digestive condition, and how you can treat and prevent it.
Heart valve disease
Learn about this condition in which one or more of the heart valves doesn't work properly.
Cardiomyopathy
This disease of the heart muscle makes it harder for the heart to pump blood to the rest of the body. Learn the different types and how they're treated.
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