Health Information Library

Headache: Symptom — Overview covers definition, possible causes of this painful symptom.

This rare type of cancer tends to occur near large joints, mainly the knee, in young adults. The main treatment is surgery.

Learn about this connective tissue cancer that often starts in the arms and legs. Myxofibrosarcoma treatments include surgery, radiation therapy and chemotherapy.

This cancer caused by a virus occurs in people who have AIDS and those with a donated organ who take medicines to prevent organ rejection.

Learn about this rare cancer that begins in smooth muscle tissue. Treatments include surgery, radiation therapy and chemotherapy.

Anyone using opioids is at risk of misusing these medicines. Don't ignore signs of harmful or illegal use. Taking action could save a loved one's life.

In this heart condition present at birth, the lung's blood vessels attach to the wrong places in the heart. Know the symptoms and how it's diagnosed.

In this heart condition present at birth, some blood vessels of the lungs connect to the wrong places in the heart. Learn when treatment is needed.

This condition, present at birth, affects the valve between the lower left heart chamber and the body's main artery. Know the symptoms and treatment.

These heart conditions present at birth cause the mitral valve to leak or become narrowed. Know the symptoms and treatment.

Learn how genetic testing can help customize your cancer treatment plan. Precision medicine is improving breast cancer diagnosis, treatment and prevention.

Learn about this tumor that forms from ependymal cells in the brain and spinal cord. Treatments include surgery, radiation therapy and chemotherapy.

Learn about the types of operations used to treat breast cancer, including lumpectomy, mastectomy, lymph node surgery and breast reconstruction.

Learn about the services available to help you feel better during and after breast cancer treatment.

What works for one person's pain may not help yours — and every pill has risks. Learn how to sort through your options for maximum relief and minimum risk.

Learn about this burst of electrical activity in the brain and what causes it. Find out what to do if you see someone having a seizure.

Learn about these malignant brain tumors that happen most often in babies and young children. Treatments include surgery, radiation therapy and chemotherapy.

Opioids act on the brain in powerful and potentially dangerous ways. Find out why no one is safe from opioid use disorder and learn what raises the risk.