Acute Lymphocytic Leukemia (ALL) or Acute Lymphoblastic Leukemia is a cancer of the white blood cells. Learn more about symptoms and treatment. READ MORE
Anemia occurs when your blood doesn't carry enough oxygen to the rest of your body. Read about conditions that lead to it and treatments available. READ MORE
An aneurysm is a bulge in the wall of an artery. It can develop and grow for years without causing any symptoms. Learn about tests and treatment. READ MORE
An aortic aneurysm is a balloon-like bulge in the aorta, the main artery carrying blood from the heart. It is an emergency if it bursts or tears. Learn more. READ MORE
Aplastic anemia is a rare but serious blood disorder. If you have it, your bone marrow doesn't make enough new blood cells. Read more on the causes. READ MORE
If you have an arrhythmia, or irregular heartbeat, your heart may beat too quickly, too slowly, or with an irregular rhythm. Learn about causes and treatments. READ MORE
Arteriovenous malformations (AVMs) are defects in your arteries, veins, and capillaries. They are common in the brain and spine. Find out more. READ MORE
Atherosclerosis is hardening and narrowing of the arteries caused by the buildup of a fatty substance called plaque. Learn about the risks and prevention. READ MORE