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Langerhans Cell Histiocytosis in Children What is Langerhans cell histiocytosis in children? Langerhans cell histiocytosis is a rare disorder. It occurs when there are very high levels of a type of immune cell called a Langerhans cell. In the past, this disorder was thought to be

Food Allergy What is a food allergy? A food allergy is when your immune system has a bad reaction to a certain food. This is different from a food intolerance, which does not involve the immune system. This is true even though some of the same signs may be present. What causes a

Von Willebrand Disease (VWD) What is VWD? Von Willebrand disease (VWD) is an inherited disorder that affects the blood's ability to clot. What causes VWD? VWD is almost always inherited. This means it is passed from parents to children. People with the disorder may have low

Pulmonary Stenosis in Children What is pulmonary stenosis in children? Pulmonary stenosis is a birth defect of the heart (congenital). It can happen when the pulmonary valve doesn’t grow as it should in a baby during the first 8 weeks of pregnancy. The pulmonary valve connects

Tibial Torsion in Children What is tibial torsion in children? Tibial torsion is an inward twisting of the shinbones. These bones are located between the knee and the ankle. Tibial torsion causes a child’s feet to turn inward. The child may look pigeon-toed (intoeing). It is

Gastroesophageal Reflux in Children What is gastroesophageal reflux in children? Gastroesophageal refers to the stomach and esophagus. The esophagus is the tube that connects the throat to the stomach. Reflux means to flow back or return. Reflux happens because the lower

Benign Prostatic Hyperplasia (BPH) What is benign prostatic hyperplasia? Benign prostatic hyperplasia (BPH) is also called benign prostatic hypertrophy. It means that the prostate gland has become very large and may cause problems passing urine. BPH is not cancer. It's a common

Acute Spinal Cord Injury (SCI) in Children What is acute spinal cord injury (SCI) in children? The spinal cord is a bundle of nerves that carries messages between the brain and the rest of the body. It sends instructions from the brain to the body and carries sensory information

Fibromyalgia in Children, Adolescents and Teens What is fibromyalgia? Fibromyalgia is a condition that causes pain in muscles and soft tissues around the body. It is an ongoing (chronic) condition. It can affect the neck, shoulders, back, chest, hips, buttocks, arms and legs. The

Diphtheria What is diphtheria? Diphtheria is an illness caused by bacteria. There are two types: Respiratory diphtheria. This type affects the throat, nose, and tonsils. Skin (cutaneous) diphtheria. This type affects the skin. It was a common childhood disease in the past. A