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Adrenoleukodystrophy (uh-dree-noh-loo-koh-DIS-truh-fee) is a type of hereditary (genetic) condition that damages the membrane (myelin sheath) that insulates nerve cells in your brain. In adrenoleukodystrophy (ALD), your body can't break down very lon...
Adult Still disease is a rare type of inflammatory arthritis. Common symptoms are fevers, rash and joint pain. The condition can occur in some people as a single episode that goes away. In other people, the condition doesn't go away, or it goes away ...
Adult attention-deficit/hyperactivity disorder (ADHD) is a mental health disorder that includes a combination of persistent problems, such as difficulty paying attention, hyperactivity and impulsive behavior. Adult ADHD can lead to unstable relations...
Agoraphobia (ag-uh-ruh-FOE-be-uh) is a type of anxiety disorder. Agoraphobia involves fearing and avoiding places or situations that might cause panic and feelings of being trapped, helpless or embarrassed. You may fear an actual or upcoming situatio...
The term albinism usually refers to oculocutaneous (ok-u-low-ku-TAY-nee-us) albinism (OCA). OCA is a group of disorders passed down in families where the body makes little or none of a substance called melanin. The type and amount of melanin in your ...
Alcohol poisoning is a serious — and sometimes deadly — result of drinking large amounts of alcohol in a short period of time. Drinking too much too quickly can affect breathing, heart rate, body temperature and gag reflex. In some cases,...
Alcohol use disorder is a pattern of alcohol use that involves problems controlling your drinking, being preoccupied with alcohol or continuing to use alcohol even when it causes problems. This disorder also involves having to drink more to get the s...
The liver The liver The liver is the largest internal organ in the body. It's about the size of a football. It sits mainly in the upper right portion of the stomach area, above the stomach. Alcoholic hepatitis is swelling, called inflammation, of the...
Allergies occur when your immune system reacts to a foreign substance — such as pollen, bee venom or pet dander — or a food that doesn't cause a reaction in most people. Your immune system produces substances known as antibodies. When you...
Alpha-gal syndrome is a type of food allergy. It makes people allergic to red meat and other products made from mammals. In the United States, the condition usually begins with the bite of the Lone Star tick. The bite transfers a sugar molecule calle...
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