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Discusses attention deficit hyperactivity disorder (ADHD), which in the past was called attention deficit disorder (ADD). Covers

An alpha-fetoprotein (AFP) blood test checks the level of AFP in a pregnant woman's blood. AFP is a substance made in the liver of

What is tinea versicolor? Tinea versicolor (say "TIH-nee-uh VER-sih-kuh-ler") is a fungal infection that causes many small, flat

What is strabismus? Strabismus (say "struh-BIZ-mus") is a vision problem in which both eyes do not look at the same point at the

Covers iron deficiency anemia. Explains role of iron in making hemoglobin, part of red blood cells. Covers causes and symptoms

Styes and chalazia are lumps in or along the edge of an eyelid. They may be painful or annoying, but they are rarely serious. Most

What is Down syndrome? Down syndrome is a genetic condition. It affects childhood growth and development. People who have it may

Radioactive iodine, given in a capsule or liquid form, is absorbed and concentrated by the thyroid gland. The treatment destroys

Discusses mononucleosis (also called mono or the kissing disease) caused by Epstein-Barr virus (EBV). Covers symptoms including

As people get older, their lower eyelids sometimes start to droop away from the eyeball. Drooping is the result of reduced muscle