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Scars What is a scar? A scar is the body's natural way of healing and replacing lost or damaged skin. A scar is often made of fibrous tissue. Scars may be formed for many different reasons. They may be due to infections, surgery, injuries, or inflammation of tissue. Scars may

Non-Hodgkin Lymphoma (NHL) in Children What is non-Hodgkin lymphoma (NHL) in children? NHL is cancer that starts in the lymphatic system. The lymphatic system is part of the immune system. It helps to fight diseases and infections. NHL results when the cells in the lymphatic

Cancer Overview What is cancer? Cancer is an abnormal growth of cells. The whole body is made of cells that act and grow in controlled ways as the body needs them. Cells are controlled by genes. The genes in any cell in the body can be damaged. Then the cell can grow out of

IgA Vasculitis in Children What is IgA vasculitis in children? IgA vasculitis is also called Henoch-Schönlein purpura (HSP). It's not contagious It involves swelling (inflammation) of small blood vessels. The swollen blood vessels leak into the skin, joints, intestines, and

Sports-Related Injuries Most sports injuries are from either injury or overuse of muscles or joints. Most are caused by minor injury involving muscles, ligaments, tendons, or bones, including: Bruises. Sprains. Strains. Fractures. Dislocations. What is a bruise? A bruise is an

Allergic Rhinitis in Children What is allergic rhinitis in children? Rhinitis is a reaction that happens in the eyes, nose, and throat. It occurs when allergens in the air set off the release of histamine and other chemicals in the body. Normally allergens are harmless. But when

Diabetes Insipidus in Children What is diabetes insipidus in children? Diabetes insipidus (DI) is a condition caused by not enough antidiuretic hormone (ADH) in the body. ADH is also known as vasopressin. This is a hormone that helps the kidneys keep the correct amount of water

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

Hypospadias in Children What is hypospadias in children? Hypospadias is a problem where the opening of the urethra is not at the tip of the penis. The urethra is the tube that carries urine from the bladder to the outside of the body. With hypospadias, the end of the tube is

Cardiovascular Disease and Diabetes You've probably heard that people with diabetes are at risk for multiple health complications. These include cardiovascular disease. As it turns out, cardiovascular disease is especially common among people with diabetes. Most people with type