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Retinoblastoma is a rare cancer of the retina of the eye. The retina is in the back of the eye. It’s the part of the eye that receives light. Retinoblastoma is the most common tumor affecting the eye in children. It almost always occurs in ...

Conduct disorder is a type of behavior disorder. It’s when a child has antisocial behavior. He or she may disregard basic social standards and rules. ...

Rabies is a viral infection that attacks the nervous system. Once symptoms develop, it is often fatal. But a rabies vaccine, or a series of vaccines, given soon after contact with an animal infected with rabies can prevent the illness. ...

Hypoglycemia is when the level of sugar (glucose) in the blood is too low. Glucose is the main source of fuel for the brain and the body. ...

Overview Lymphadenopathy means swelling of the lymph nodes or glands. These are the bean-shaped glands in the neck, armpits, groin, chest, and abdomen. These glands act as filters for lymphatic fluid. This fluid contains white blood cells (lymphocytes) that help the body fight infection. Lymphadenopathy ...

Anemia is a common health problem in children. The most common cause of anemia is not getting enough iron. A child who is anemic does not have enough red blood cells or enough hemoglobin. Hemoglobin is a protein that lets red blood cells carry oxygen ...

Juvenile ankylosing spondylitis is a type of arthritis. It affects children in the spine and the places where the muscles, tendons, and ligaments are attached to bone. Ankylosing means stiff or rigid. Spondyl means spine. Itis refers to inflammation. ...

Guillain-Barré syndrome (GBS) is a short-term but often life-threatening disorder that affects the nerves in the body. GBS can cause muscle weakness, pain, and short-term (temporary) paralysis of the facial, chest, and leg muscles. ...

What is bronchiolitis in children? Bronchiolitis is an infection of the lungs. It’s when your child has swelling in the smaller airways (bronchioles) of the lung. This swelling blocks air in the smaller airways. Bronchiolitis usually happens in the winter and early spring. It most ...

Becker muscular dystrophy (BMD) is a rare disorder of the muscles that causes weakness of skeletal muscles, breathing muscles, and the heart muscle. ...