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Cystic Fibrosis Overview What is cystic fibrosis? Cystic fibrosis (CF) is an inherited disease of the glands that make mucus and sweat. People with CF get a defective gene from both parents. People who have one defective gene from one parent are called carriers. They don't have

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

Cholesterol, LDL, HDL, and Triglycerides in Children and Teens What is cholesterol? Cholesterol is a fat-like, waxy substance. It can be found in all parts of your child's body. It helps make cell membranes, some hormones, and vitamin D. The cholesterol in blood comes from 2

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

Persistent Depressive Disorder in Children What is persistent depressive disorder in children? Persistent depressive disorder is a type of depression. Depression affects a child's body, mood, and thoughts. It can disturb eating, sleeping, or thinking patterns. It's not the same

Rumination Syndrome What is rumination syndrome? Rumination syndrome is a rare behavioral problem. It affects children, adolescents and some adults. Rumination syndrome causes an automatic regurgitation of recently eaten food. If your child has this problem, he or she will

Immunotherapy: What Is It? Your immune system protects you from illness and foreign substances that can harm you. Scientists have found a way to use the body's immune system to help treat or prevent many health problems. This treatment is known as immunotherapy. Uses of

Granulomatosis with Polyangiitis (GPA) What is granulomatosis with polyangiitis? Granulomatosis with polyangiitis (GPA) is an autoimmune disorder. An autoimmune disorder occurs when the body's immune system attacks and destroys healthy tissue. GPA causes inflammation, swelling

Dermatomyositis What is dermatomyositis? Dermatomyositis is a rare disease that causes muscle inflammation and skin rash. It's one of a group of muscle diseases that cause muscle inflammation, weakness, and swelling. It's different from other muscle diseases because it also

Sjögren Syndrome What is Sjögren syndrome? Sjögren syndrome is an autoimmune disorder. This means that the body’s own immune system attacks its own healthy cells and tissues by mistake. In this case, it attacks the glands that make moisture. It commonly causes dry skin, dry eyes