Stress basics
Learning Center
Type 1 diabetes
Learn about the symptoms, causes, treatment of this chronic condition in which the pancreas produces little or no insulin.
Twin pregnancy: What twins or multiples mean for mom
Twin pregnancy or other multiples? Here's help taking care of yourself — and your babies.
Turner syndrome
Turner syndrome affects only females as the result of a missing or partially missing X chromosome, causing a variety of medical and developmental problems.
Tuberous sclerosis
This uncommon genetic disorder causes tumors that are not cancer. These tumors are unexpected overgrowths of tissue in different parts of the body.
Tubal ligation
Thinking of getting your tubes tied? This surgery offers a permanent form of birth control. Know the risks and what to expect.
Truncus arteriosus
Learn more about this congenital heart defect that makes it difficult for the heart to pump the right amount of blood to the lungs and the body.
Triple X syndrome
Females with this genetic disorder have three X chromosomes instead of two. Symptoms can be mild or include developmental delays and learning disabilities.
Triglycerides: Why do they matter?
Like cholesterol, triglycerides can cause health problems. Here's how to lower your triglycerides.
Tricuspid valve repair and tricuspid valve replacement
These heart surgeries treat tricuspid valve regurgitation and stenosis and Ebstein anomaly, a type of congenital heart defect. Learn how they're done.
Tricuspid valve regurgitation
A leaky tricuspid valve may make you feel tired and have difficulty exercising. Learn how this type of heart valve disease is diagnosed and treated.
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