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Amniotic Band Birth Defects

A group of birth defects thought to have a common origin in a malfunction of the amnion part of the pregnancy membranes.


A lower than the normal number of red blood cells, which carry oxygen from the lungs and distribute it throughout the entire body.


The board certified pediatric anesthesiologists at Lurie Children's use the highest safety standards when administering anesthesia to children.


A skin condition that causes larger areas of swelling than occurs in hives.

Anomalous Aortic Origin of the Coronary Artery (AAOCA)

A congenital heart defect in which one of the arteries that bring blood to the heart muscle is not attached in the normal position.

Anomalous Left Coronary Artery Arising from the Pulmonary Artery (ALCAPA)

Anomalous left coronary artery arising from the pulmonary artery (ALCAPA) is a rare pediatric heart condition that Lurie Children’s treats.

Anorectal Malformations

Abnormal position of the anus, rectum, lower spinal cord, and the genitourinary tract.

Anterior Cruciate Ligament (ACL) Injury

An injury to a stabilizing ligament of the knee that keeps the tibia from sliding forward, especially with twisting or pivoting motions.


An acute infection caused by Bacillus anthracis, which could be a potential threat to humans if used in biological warfare.

Antibody Deficiency

A lack of antibodies in the blood creating conditions where the body does not respond normally to foreign substances in the body.


A normal stress reaction to our surroundings, triggering the body to physically and mentally prepare for possible danger.

Aortic Valve Stenosis

Aortic valve stenosis (also referred to as aortic stenosis) occurs when the aortic valve is narrowed or thickened and causes obstruction. Learn more.