Conditions & Treatments

Pneumonia is a serious and potentially life-threatening lung infection. A germ called Mycoplasma pneumoniae is often responsible for a milder type of pneumonia called "walking pneumonia." ...

Warts on the skin are harmless growths. They are caused by a virus. Warts can spread to other parts of the body and to other people. ...

Facts about obesity in adolescence According to the National Center for Health Statistics, about 20% of children ages 6 to 11 in the U.S. are considered overweight and 18% of teens (ages 12 to 19) are overweight. Many more people are now overweight than 15 ...

West Nile fever is an illness caused by a virus. The virus is spread by mosquito bites. West Nile fever in people is rare. It usually causes mild, flu-like symptoms. In rare cases, it can cause life-threatening illness of the brain and lining covering the ...

Whooping cough (pertussis) is a contagious illness. It causes intense fits (paroxysms) of coughing and mainly affects babies and young children. The pertussis vaccine can help prevent the illness. ...

What is Williams Syndrome? Williams syndrome (WS) is a rare genetic disorder that occurs in about 1 in 8,000 births. It is associated with developmental delays and medical problems affecting multiple parts of the body. Features of Williams syndrome include: Characteristic facial features that have ...

The Williams Syndrome Center provides diagnosis and treatment for children with developmental delays and medical problems associated with Williams Syndrome. Call St. Louis Children's Hospital to learn more. ...

Wilms tumor is a cancerous tumor that starts in the cells of the kidney. It’s the most common type of kidney cancer in children. It’s usually found by the time a child is age 3 or 4. ...

Wilson's Disease, also known hepatolenticular degeneration, is a genetic disorder in which copper accumulates in tissues of the body. The accumulation of copper in the body can cause neurological symptoms, psychiatric problems and liver disease. ...

Wolff-Parkinson-White Syndrome (WPW) is a heart arrhythmia in which an electrical signal may arrive at the ventricle too fast due to an extra conduction pathway or a shortcut from the atria to the ventricles. ...