Anophthalmia and Microphthalmia are two rare eye conditions that affect the development of the eyes. Anophthalmia is a condition in which one or both eyes are absent at birth, while Microphthalmia is a condition in which one or both eyes are abnor...

Anophthalmia plus syndrome is a rare genetic disorder characterized by the absence of one or both eyes (anophthalmia) and a variety of other physical abnormalities. These can include malformations of the head and face, skeletal abnormalities, and ...

Anophthalmia-megalocornea-cardiopathy-skeletal anomalies syndrome (AMCS) is a rare genetic disorder characterized by the absence of one or both eyes (anophthalmia), abnormally large corneas (megalocornea), heart defects (cardiopathy), and skeletal...

Anophthalmia/microphthalmia-esophageal atresia syndrome is a rare genetic disorder characterized by the absence of one or both eyes (anophthalmia/microphthalmia) and a birth defect of the esophagus (esophageal atresia). This disorder is caused by ...

Anorexia nervosa facts Anorexia nervosa is a a psychiatric condition, which is part of a group of eating disorders. The cause of anorexia has not been definitively established, but self-esteem and body-image issues, societ...

Antecubital pterygium syndrome is a rare genetic disorder characterized by webbing of the skin between the elbow and wrist. It is caused by a mutation in the gene that codes for the protein fibronectin. Symptoms of the disorder include webbing of ...

Antenatal multiminicore disease with arthrogryposis multiplex congenita (AMC-AMC) is a rare genetic disorder that affects the development of the muscles and joints. It is characterized by multiple joint contractures (arthrogryposis) and a reductio...

Torn anterior cruciate ligament (ACL) facts The anterior cruciate ligament is one of the four ligaments in the knee that provides stabilization. Torn ACLs are a common knee injury. An ACL tear or sprain occurs wh...

Anterior cutaneous nerve entrapment syndrome (ACNES) is a condition that occurs when the anterior cutaneous nerve, a branch of the femoral nerve, becomes compressed or entrapped. This can cause pain, numbness, and tingling in the front of the thig...

Anterior maxillary protrusion-strabismus-intellectual disability syndrome is a rare genetic disorder characterized by a protrusion of the upper jaw, strabismus (crossed eyes), and intellectual disability. It is caused by a mutation in the GNAI3 ge...

Anthrax facts Anthrax is an infection by bacteria transmitted from animals. Anthrax causes skin, lung, and bowel disease and can be deadly. Anthrax is diagnosed by cultures from infected tissues. Anthrax is...

Anthrax is a serious infectious disease caused by the bacterium Bacillus anthracis. It can affect both humans and animals, and can be spread through contact with infected animals or contaminated animal products. In humans, it can cause skin infect...

Anti-glomerular basement membrane disease (anti-GBM disease) is a rare autoimmune disorder in which the body's immune system mistakenly attacks the glomerular basement membrane (GBM), a thin layer of cells that lines the glomeruli in the kidneys. ...

Anti-HLA hyperimmunization is a process in which a person is exposed to high levels of antibodies against human leukocyte antigens (HLA). This process is used to induce tolerance to HLA antigens, which can be beneficial for people who need organ t...

Anti-p200 pemphigoid is a rare autoimmune skin disorder that is characterized by the formation of blisters and lesions on the skin. It is caused by the body's immune system attacking the proteins in the skin's basement membrane, which is the layer...

What is antiphospholipid syndrome? What are antiphospholipid syndrome symptoms and signs? The antiphospholipid syndrome is a disorder of the immune system that is characterized by excessive clotting of blood and/or certain complications of...

Antiphospholipid Syndrome (APS) is an autoimmune disorder characterized by the presence of antiphospholipid antibodies in the blood. These antibodies can cause recurrent blood clots, miscarriages, and other health problems. APS can affect any orga...