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Lymphatic Malformations in Children What is a lymphatic malformation in children? A lymphatic malformation is a lymphatic vessel that isn't formed correctly. The vessel traps the lymph fluid and causes cysts to form. Your child may have one or more of these cysts. Lymphatic

Congenital Laryngeal Stridor in Babies What is congenital laryngeal stridor? Congenital laryngeal stridor is a noisy or high-pitched sound with breathing. It is from an abnormally formed voice box (larynx). It's present at birth (congenital). What causes congenital laryngeal

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

Gestational Diabetes What is gestational diabetes? Gestational diabetes is a type of diabetes that happens during pregnancy. Unlike type 1 diabetes, gestational diabetes is not caused by having too little insulin. Instead, hormones made by your placenta keep your body from using

Atherosclerosis What is atherosclerosis? Atherosclerosis is thickening of the walls of the arteries. It is also known as hardening of the arteries. It is caused by a buildup of plaque in the inner lining of an artery. Plaque is made up of deposits of fatty substances, cholesterol

Autism Spectrum Disorder in Children What is autism spectrum disorder in children? Autism spectrum disorder (ASD) is a problem that affects a child’s nervous system and growth and development. It often shows up during a child’s first 3 years of life. Some children with ASD seem

Menstrual Cramps (Dysmenorrhea) in Teens What are menstrual cramps in teens? Menstrual cramps are severe, painful cramps that occur during a period. There are two types: Primary. This type starts soon after the first menstrual period. It's usually lifelong. But it may get better

Middle Ear Infection (Otitis Media) in Adults What is a middle ear infection? A middle ear infection occurs behind the eardrum. It's most often caused by a virus or bacteria. Most kids have at least one middle ear infection by the time they are 3 years old. Adults can also get

Glomerulonephritis in Children What is glomerulonephritis in children? The kidneys contain many coils of tiny blood vessels. Each of these is called a glomerulus. Glomeruli filter substances from the blood into the urine. Glomerulonephritis is a type of kidney disease where these

HIV/AIDS What is HIV/AIDS? The term AIDS refers to the most advanced stages of an infection caused by the human immunodeficiency virus (HIV). The current definition of AIDS includes: All HIV-infected people who have fewer than 200 CD4+ T cells (also called T4 cells or just T