Diseases & conditions A-Z List
Diseases & Conditions A-Z List - «A»:
Astigmatism is a type of refractive error of the eye. Refractive errors cause blurred vision and are the most common reason why a person goes to see an eye professional.
Other types of refractive errors are:
People are able to see because the front part o...
Asymptomatic means there are no symptoms. You are considered asymptomatic if you:
Have recovered from an illness or condition and no longer have symptoms
Have an illness or condition (such as early stage high blood pressure or glaucoma) but do not have symptoms
Asymptomatic bacteriuria is a significant number of bacteria in the urine that occurs without usual symptoms such as burning during urination or frequent urination.
Asymptomatic bacteriuria may not need treatment, which makes it different from a bacterial urinary tract infection.
Asymptomatic HIV infection
Asymptomatic HIV infection is a phase of chronic infection with human immunodeficiency virus (HIV) during which there are no symptoms of HIV infection.
Asymptomatic HIV infection is a period of time, which varies in length from person to person, in which the immune system slowly deteriorates...
Ataxia - telangiectasia
Ataxia-telangiectasia is rare childhood disease that affects the brain and other parts of the body.
Ataxia refers to uncoordinated movements, such as walking. Telangiectasias are enlarged blood vessels (capillaries) just below the surface of the skin. Telangiectasias appear as tiny, red, spider-like...
Atelectasis is the collapse of part or all of a lung.
See also: Pneumothorax
Atelectasis is caused by a blockage of the air passages (bronchus or bronchioles) or by pressure on the outside of the lung.
Risk factors for developing atelectasis include:
Foreign object in the airway...
Atheroembolic renal disease
Atheroembolic renal disease (AERD) is an inflammatory reaction in the small blood vessels of the kidneys.
AERD is linked to atherosclerosis. Atherosclerosis is a common disorder of the arteries. It occurs when fat, cholesterol, and other substances build up in the walls of arteries and form ...
Atherosclerosis is a condition in which fatty material collects along the walls of arteries. This fatty material thickens, hardens (forms calcium deposits), and may eventually block the arteries.
Atherosclerosis is a type of arteriosclerosis. The two terms are often used to mean the same thing.
Athlete's foot is an infection of the feet caused by fungus. The medical term is tinea pedis. Athlete's foot may last for a short or long time and may come back after treatment.
The body normally hosts a variety of microorganisms, including bacteria and fungi. Some of these are useful to the...
Eczema is a chronic skin disorder that involves scaly and itchy rashes. as well as blistering, weeping, or peeling of the skin. Atopic eczema is the most common type.
Atopic eczema is due to a hyp...
Atrial fibrillation - discharge
You may have been in the hospital because you have atrial fibrillation. When you have atrial fibrillation, your heart beats in an irregular way, usually faster than normal. You may have also developed this problem while you were in the hospital for a heart attack, heart surgery, or other illness suc...
Atrial fibrillation/flutter is a heart rhythm disorder (arrhythmia). It usually involves a rapid heart rate that is not regular.
Arrhythmias are caused by problems with the heart's normal electrical conduction system.
Normally, the four chambers of the heart (two atria and two ventricles) c...
An atrial myxoma is a noncancerous tumor in the upper left or right side of the heart. It grows on the wall (atrial septum) that separates the two sides of the heart.
A myxoma is a primary heart (cardiac) tumor. This means that the tumor started within the heart. Most heart tumors start some...
Atrial septal defect
Atrial septal defect (ASD) is a congenital heart defect in which the wall that separates the upper heart chambers (atria) does not close completely. Congenital means the defect is present at birth.
In fetal circulation, there is normally an opening between the two atria (the upper chambers o...
Atrophic vaginitis is inflammation of the vagina due to thinning tissue and decreased lubrication. It is related to reduced estrogen levels.
For other types and causes of vaginitis, see: Vulvovaginitis
Atrophic vaginitis is caused by a decrease in estrogen. Estrogen levels normally drop aft...