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Hemophilia What is hemophilia? Hemophilia is an inherited bleeding disorder. People with hemophilia bleed easily because they don’t have enough of one of the clotting factors in their blood. Clotting factors are needed for blood to clot. Blood clots to prevent excessive bleeding

Juvenile Idiopathic Arthritis What is juvenile idiopathic arthritis? Juvenile idiopathic arthritis (JIA) is a form of arthritis in children. Arthritis causes joint swelling (inflammation) and joint stiffness. JIA is arthritis that affects 1 or more joints for at least 6 weeks in

Arrhythmias in Children What are arrhythmias in children? An arrhythmia is an abnormal heart rhythm. When a child has an arrhythmia, abnormal electrical signals sent through the heart muscle may cause the heart to beat too fast (tachycardia), too slow (bradycardia), or in an

Turner Syndrome (Monosomy X) in Children What is Turner syndrome (TS) in children? Turner syndrome (TS) is a genetic disorder that occurs in girls. It causes many traits and problems. Girls with TS are shorter than most girls. They don’t go through normal puberty as they grow

Epilepsy and Seizures in Children What is epilepsy in children? Epilepsy is a brain condition that causes a child to have recurring seizures over time. These seizures can't be linked to a short-term (acute) illness such as an infection, or a short-term injury such as a brain

Shingles What is shingles? Shingles (herpes zoster) is a common infection of the nerves. It is caused by a virus. Shingles set off a painful rash or small blisters on an area of skin. It can appear anywhere on the body, but it typically appears on only one side of the face or

Astrocytoma in Children What is an astrocytoma in children? An astrocytoma is a type of brain tumor. 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 cord. The main parts of the

Ewing Sarcoma in Children What is Ewing sarcoma in children? Ewing sarcoma is a rare type of cancer. It can affect a person of any age but it’s most common between ages 10 and 20. It often grows in bone, but it can also grow in soft tissue that’s connected to the bone. This may

Germ Cell Tumors (GCTs) in Children What are germ cell tumors in children? A type of cell that forms as a fetus (also called unborn baby or embryo) develops is called a germ cell. Germ cells are the cells that make the eggs (ova) in females and the sperm in males. Germ cell

Hodgkin Lymphoma in Children What is Hodgkin lymphoma in children? Hodgkin lymphoma is also called Hodgkin disease. It's a type of cancer that starts in the lymphatic system. The lymphatic system is part of the immune system. It helps to fight diseases and infections. The