Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «T»:
Technetium tetrofosmin scintimammography
Technetium tetrofosmin scintimammography: Scintimammography is an imaging technique that uses a radioisotope (a radioactive substance) to help visualize the breast and find cancer.
Scintimammography using the radioisotope technetium tetrofosmin (Tc-99 tetrofosmin) can detect breast cancer sometimes ...
Technology transfer: The process of converting
scientific findings from research laboratories into useful products by the commercial
Technology, recombinant DNA
Technology, recombinant DNA: A series of procedures
used to join together (recombine) DNA segments. A recombinant DNA molecule is constructed
(recombined) from segments from 2 or more different DNA molecules. Under certain
conditions, a recombinant DNA molecule can enter a cell and replicate there, ...
TEE: Transesophageal echocardiography. A diagnostic test which employs ultrasound waves to make images of the heart chambers, valves and surrounding structures and which is done through the esophagus.
TEE may be used, for example, in the treatment of children having heart surgery. TEE has unusually ...
Teething: Teething is the
emergence of the primary (baby) teeth through a baby or child's gums. Teething usually begins between four and seven months of age. While the lower central bottom teeth (central incisors) are normally the first primary teeth to erupt, the teething process can vary among in...
Telangiectasia perstans: A form of mastocytosis that usually affects adults, characterized by the presence of multiple hyperpigmented macules with telangiectases (visibly dilated small blood vessels), located primarily on the trunk, but also on the extremities....
Telangiectasia, hereditary hemorrhagic
Telangiectasia, hereditary hemorrhagic: See: Hereditary hemorrhagic telangiectasia....
Telemedicine: The use of medical information exchanged from one site to another via electronic communications for the health and education of the patient or healthcare provider and for the purpose of improving patient care. Telemedicine includes consultative, diagnostic, and treatment services....
Teleological: Serving an ultimate purpose in its design.
For example, "What is the true purpose of the nose?" That is a teleological question. For another example, to say that all evolutionary changes occur for a definite purpose is a teleological explanation of evolution.
"Teleological" comes fr...
Teleology: The study of the ultimate purpose of the design of something in nature.
For example, "what is the true purpose of the nose?" is a teleological question and, to say that all evolutionary changes occur for a definite purpose is a teleological explanation of evolution.
"Teleology" comes f...
Telepathology: The use of telecommunications technology to facilitate the transfer of image-rich pathology data between remote locations for the purposes of diagnosis, education, and research.
Telepathology systems are divided into three major types: static image-based systems, real-time systems, a...
Telesurgery: Surgical procedures carried out at a distance thanks to advances in robotic and computer technology and their applications to surgery.
The first demonstration of trans-Atlantic telesurgery was reported in 2001 when surgeons in New York operated on a 68-year-old woman in Strasbourg, Fr...
Telogen effluvium: Excessive temporary loss of telogen hair (hair in the telogen, or resting, phase) caused by trauma such as childbirth, surgery, starvation, certain drugs, and high fever. A normal human hair goes through 3 successive stages of growth:
The growing, or anagen, stage is the predomi...
Telomerase: An enzyme concerned with the
formation, maintenance, and renovation of telomeres, the ends of chromosomes. Telomerase regulates the proliferative capacity of human cells. Telomerase activation plays a critical role in the progression of cancer as well as in normal somatic cells. Failure...
Telomere: The end of a chromosome, a specialized
structure involved in the replication and stability of the chromosome.
On the DNA level, the telomere is a dull stretch of road. It is a
length of DNA monotonously made up of a recurring motif of 6
nucleotide bases (namely, the sequence TTAGGG) t...