Antigens can be substances like bacteria, viruses, or even pollen that invade the body.arrhythmia Arrhythmias are also called heart rhythm problems. Arrhythmias occur when the heart that beats too fast (called tachycardia), too slow (called bradycardia), or irregularly.bipolar disorder Also called manic-depressive disorder. A mental disorder that causes mood swings that range from of the lows of depression to the highs of mania.blood-brain barrier A separation between the circulating blood and cerebrospinal fluid that selectively prevents substances from passing out of the blood stream into brain tissue and cerebrospinal fluid.amino acid An organic compound containing nitrogen, carbon, hydrogen and oxygen; one of the 20 building blocks of protein. An aneurysm can grow large and rupture–or burst–or dissect, which occurs when one or more layers of the artery walls splits. angiography An imaging study that is used to evaluate patients for coronary artery disease.
bone scan A diagnostic imaging test in which radioactive material called a radiotracer when injected into the patient’s bloodstream accumulates predominantly in the bones and can be detected by an imaging device.
For example, the presence of prostate specific antigen (PSA) in the body is a marker for prostate disease.
biopsy The process of removing a small amount of tissue from the body for examination under a microscope.
In an axillary lymph node dissection, the lymph nodes under the armpit are explored and removed as a part of breast cancer surgery.
Some or all of these lymph nodes are examined under a microscope by a pathologist to see if cancer cells are present.