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Chiari Malformation Type I in Children What is a Chiari malformation in children? A Chiari malformation (CM) is a problem with how the brain sits in the skull. The brain normally sits fully inside the skull. With a Chiari malformation, the lower part of the brain (cerebellum)

Immune Disorders Many different immune disorders require clinical care by a physician or other health care professional. Listed in the directory below are some, for which we have provided a brief overview. All About the Immune System Immune Deficiencies Disorders of the Immune

Persistent Pulmonary Hypertension in the Newborn What is persistent pulmonary hypertension (PPHN) in the newborn? Persistent pulmonary hypertension (PPHN) happens in newborn babies. It occurs when a newborn’s circulation continues to flow as it did while in the uterus. When this

Circumcision for Children What is circumcision for children? Circumcision is a surgery to remove the skin covering the end of the penis. This skin is called the foreskin. This surgery is most often done 1 or 2 days after a baby’s birth. Circumcision can also be done on older

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

Aortic Stenosis in Children What is aortic stenosis in children? Aortic stenosis means that your child has a heart valve that is too narrow or is blocked. The aortic valve is 1 of 4 heart valves that keep blood flowing through the heart. The valves make sure blood flows in only

Allergy Overview What are allergies? Allergies are due to a problem with the body's immune system. Most allergic reactions happen when the immune system reacts to a false alarm. Normally the immune system attacks harmful things, such as viruses or bacteria. But sometimes it

Encopresis What is encopresis? Encopresis is when your child leaks stool into their underwear. It's also called stool soiling. It's most often because of long-term (chronic) constipation. Encopresis happens to children ages 4 and older who have already been toilet trained. In

Constipation in Children What is constipation in children? Constipation is when a child has very hard stools and has fewer bowel movements than normal. It is a very common gastrointestinal (GI) problem. Signs that a child has constipation include: Having fewer bowel movements

Osteomyelitis in Children What is acute osteomyelitis in children? Acute osteomyelitis is an infection in the bone. It develops over a short time, usually about 2 weeks. In children, osteomyelitis is more common in the long bones of the arms and legs; however, it can affect any