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Graves disease is an autoimmune disease. With this disease, antibodies cause the thyroid gland to make too much thyroid hormone. This is known as hyperthyroidism. Excess thyroid hormone in the bloodstream leads to the body's metabolism being too active. It can cause problems such as weight loss, nervousness, fast heartbeat, tiredness, and other issues. It’s an ongoing (chronic) condition that needs lifelong treatment.

Langerhans cell histiocytosis is a rare disorder that causes damage to tissues all over the body. Read on to learn about causes, symptoms, diagnosis, and treatments.

Attention deficit/hyperactivity disorder (ADHD) is a common mental affecting millions of children.

Vaginal cancer starts in the cells that form the vagina or birth canal. Learn more about symptoms, diagnosis, and treatments.

Learn about skull base surgery, including why and how it's done, and what to expect afterward.

Atopic dermatitis is a chronic, inherited skin condition that affects millions of Americans. The following quiz offers helpful facts about the condition.

This test checks for antibodies that are a sign of Sjogren syndrome, an autoimmune disease that makes it hard for your glands to make enough moisture.

If your tricuspid heart valve leaks or narrows, you will need surgery to repair it. Learn what to expect before, during, and after this surgery.

Kyphoplasty is a procedure used to treat fractures or breaks in the vertebrae. It involves injecting a cement-like material into the vertebra to make it more stable.