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Sexually Transmitted Infections (STIs) What are sexually transmitted infections (STIs)? STIs are infections passed from person to person through sexual contact. They may also be called STDs for sexually transmitted diseases. Millions of new cases are diagnosed every year in the U

Congenital Heart Disease According to the American Heart Association, about 9 of every 1,000 babies born in the U.S. have a congenital heart defect. This is a problem that occurs as the baby's heart is developing during pregnancy, before the baby is born. Congenital heart defects

Germ Cell Tumors (GCTs) in Children What are germ cell tumors in children? A type of cell that forms as a fetus (also called an 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 tumors (GCTs) are

Breast Cancer: Surgery Surgery is a common treatment for breast cancer. It’s done to remove as much of the cancer as possible. You have many surgical choices. The type of surgery you need depends on: The size of the breast lump or tumor and where it is in your breast. The type of

Graves Disease in Children What is Graves disease in children? Graves disease is an autoimmune disease. The immune system normally protects the body from infection and disease with proteins called antibodies. But with an autoimmune disease, the antibodies attack the body's own

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

Acquired Hypothyroidism in Children What is hypothyroidism in a child? Hypothyroidism is when the thyroid gland doesn't make enough thyroid hormone. The condition is more common in adults. But it’s the most common thyroid disorder in children. Not enough thyroid hormone leads to

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

Craniopharyngioma in Children What is craniopharyngioma in children? Craniopharyngioma is a brain tumor that’s not cancer (benign). 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

Rett Syndrome in Children What is Rett syndrome in children? Rett syndrome is a rare genetic developmental and neurological disorder. It almost exclusively affects girls. Children with this disorder often develop normally for their first 6 to 18 months. After that, they start to