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HIV AIDS What is HIV/AIDS? The term AIDS refers to the most advanced stages of an infection caused by the human immunodeficiency virus (HIV). The current definition of AIDS includes: All HIV-infected people who have fewer than 200 CD4+ T cells (also called T4 cells). These cells

Stroke What is a stroke? A stroke, or brain attack, happens when blood flow to your brain is stopped. It's an emergency situation. Call 911 if you think you might be having a stroke or stroke symptoms. The brain needs a constant supply of oxygen and nutrients to work well. If the

Allergies in Children What are allergies in children? Allergies are problems of the immune system. Most allergic reactions happen when the immune system reacts to a “false alarm.” Normally, the human body defends itself against harmful things, such as viruses or bacteria. But

Obsessive-Compulsive Disorder (OCD) in Children What is obsessive-compulsive disorder in children? Obsessive-compulsive disorder (OCD) is a type of anxiety disorder. Obsessions are recurring thoughts. Compulsions are recurring behaviors. A child with OCD has obsessive thoughts

Craniosynostosis What is craniosynostosis? The skull is made up of 8 bones and joints where the bones of the skull meet (sutures). These sutures allow the skull to grow as an infant grows and develops. Over time, the sutures close and the bones fuse together. This forms the skull

Atopic Dermatitis What is atopic dermatitis? Atopic dermatitis is a long-term (chronic) skin disorder. It causes dry, itchy, scaly patches. These are often on the face and the head in babies. It’s most common in infants or very young children. Most will show signs of the

Truncus Arteriosus (TA) What is truncus arteriosus? Truncus arteriosus is a heart defect that is present at birth (congenital). It happens when there is an abnormal connection between the aorta and pulmonary artery. Normally, the aorta and the pulmonary artery are separate. In

Craniopharyngioma in Children What is craniopharyngioma in children? Craniopharyngioma is a brain tumor that’s not cancer (benign). A brain tumor is an abnormal growth of tissue in the brain. The brain is part of the central nervous system (CNS). The CNS also includes the spinal

Atrioventricular (AV) Canal Defect in Children What is an atrioventricular canal defect in a child? An atrioventricular (AV) canal defect is a congenital heart defect. This means that your child is born with it. AV canal defect is a large hole in the center of the heart. It is

Coronary Heart Disease What is coronary heart disease? Coronary heart disease happens when the innermost layer of the coronary arteries becomes inflamed and narrowed. This is caused by a buildup of fatty deposits called plaque. These deposits may start in childhood and continue