Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «T»:
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Th1
Th1: A distinct type of T-helper cell. See: T-helper cell....
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Th2
Th2: A distinct type of T-helper cell. See: T-helper cell....
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Th3
Th3: A distinct type of T-helper cell. See: T-helper cell....
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Thai hemorrhagic fever
Thai hemorrhagic fever: A
syndrome due to the dengue virus that tends to affect
children under 10, causing abdominal pain, hemorrhage
(bleeding) and circulatory collapse (shock). Known also as
dengue hemorrhagic fever (DHF), it starts abruptly with
high continuous fever and headache plus res...
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Thalassemia
Thalassemia: Not just one disease but
rather a complex series of genetic (inherited) disorders all of which involve
underproduction of hemoglobin, the indispensable molecule in red blood cells that carries
oxygen. The globin part of hemoglobin is made up of 4 polypeptide chains (usually 2 chains
of ...
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Thalassemia major
Thalassemia major: The dire disease also known as beta
thalassemia. The clinical picture of this form of anemia was first described in 1925 by
the pediatrician Thomas Benton Cooley. Other names for the disease are Cooley's
anemia and Mediterranean anemia. The term thalassemia was coined by the Nobel...
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Thalassemia minor
Thalassemia minor:
Also called thalassemia trait, thalassemia minor is the carrier state for beta thalassemia. People who are carriers (heterozygotes) have just one thalassemia gene, are said to have thalassemia minor, and are essentially normal...
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Thalassemia, alpha
Thalassemia, alpha: A blood disorder, thalassemia is not one disease but rather a group of disorders that have a single feature in common: they all have a genetic defect in the production of hemoglobin, the protein that enables red blood cells to carry oxygen.
All forms of hemoglobin are made up of ...
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Thalassemia, beta
Thalassemia, beta: Also known as thalassemia major .The
clinical picture of this important type of anemia was first described in 1925 by the
pediatrician Thomas Benton Cooley.. Other names for the disease are Cooley's anemia and Mediterranean anemia. The name thalassemia was coined by the Nobel Priz...
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Thalassiosira pseudonana
Thalassiosira pseudonana: An ocean diatom that is a major participant in the biological pumping of carbon to ocean depths and that has potential for mitigating global climate change. The DNA of this diatom is being sequenced....
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Thalidomide baby
Thalidomide baby: An infant affected by
prenatal exposure to the drug thalidomide. This medication
was prescribed to pregnant women for treatment of morning
sickness until removal from the market in 1962. It causes a
wide variety of serious birth defects, including short,
flipper-like limbs. Mo...
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Thallium
Thallium: A metallic element having the symbol Tl and the atomic number 81 and an atomic weight of about 204.
Thallium enters the environment primarily from coal-burning and smelting, in which it is a trace contaminant of the raw materials. It stays in the air, water, and soil for a long time and i...
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Thallium poisoning
Thallium poisoning: Poisoning with the element thallium which enters the environment primarily from coal-burning and smelting. It stays in the air, water, and soil for a long time and is not broken down. It builds up in fish and shellfish. The major source of exposure to thallium for most people is ...
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Thallium scan
Thallium scan: A method of examining the heart to obtain information about the blood supply to the heart muscle. In the scan, special cameras take a series of pictures of the heart. Radioactive thallium is injected into the bloodstream and serves as a tracer. The tracer attaches to certain cells and...
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Thanatology
Thanatology: The study of death and dying, including the medical, psychological, and sociologic aspects of it. Each society has its own responses to death and dying. From the Greek thanatos meaning death + -logy....
