Category: A

Avascular necrosis Avian influenza (See: Bird flu (avian influenza)) AVNRT (See: Atrioventricular nodal reentry tachycardia (AVNRT)) Overview Avascular necrosis is the death of bone tissue due to a lack of blood supply. Also

Autonomic neuropathy Overview Autonomic neuropathy occurs when the nerves that control involuntary bodily functions are damaged. It can affect blood pressure, temperature control, digestion, bladder function and even sexual

Autoimmune pancreatitis Overview Autoimmune pancreatitis, also called AIP, is a chronic inflammation that is thought to be caused by the body’s immune system attacking the pancreas and that responds to steroid therapy.

Autoimmune hepatitis Overview Autoimmune hepatitis is liver inflammation that occurs when your body’s immune system turns against liver cells. The exact cause of autoimmune hepatitis is unclear, but genetic and environmental

Autism spectrum disorder Overview Autism spectrum disorder is a condition related to brain development that impacts how a person perceives and socializes with others, causing problems in social interaction and communication.

Atypical hyperplasia of the breast Overview Atypical hyperplasia is a precancerous condition that affects cells in the breast. Atypical hyperplasia describes an accumulation of abnormal cells in the breast. Atypical hyperplasia

Atypical depression Overview Any type of depression can make you feel sad and keep you from enjoying life. However, atypical depression — also called depression with atypical features — means that your depressed mood

Attention-deficit/hyperactivity disorder (ADHD) in children Attention-deficit/hyperactivity disorder in adults (See: Adult attention-deficit/hyperactivity disorder (ADHD)) Overview Attention-deficit/hyperactivity disorder

Supraventricular tachycardia Atrioventricular septal defect (See: Atrioventricular canal defect) Atrophic vaginitis (See: Vaginal atrophy) Attachment disorder (See: Reactive attachment disorder) Atrioventricular nodal reentry

Atrioventricular canal defect Overview Atrioventricular canal defect is a combination of heart problems resulting in a defect in the center of the heart. The condition occurs when there’s a hole between the heart’s