Dr. Donald Levy, Allergy, Asthma, and Immunology, Orange County Ca

Home Page
Resource Center
Insurance Carriers

USNews - Top Doctors
Call Dr. Donald Levy about your allergies today (714) 639-7847
Welcome to Allergy Medicine, Orange CA

Glossary Index :











































































































































































Office Location:
705 W. La Veta Ave.
Suite 101
Orange, CA 92868
(714) 639-7847



Medical Glossary Index:


Tachycardia- a rapid heart rate (over 100 beats per minute)

Tapeworm- a parasitic worm that lives in the intestines; causes diarrhea and abdominal discomfort

Tar- the sticky, brown substance in cigarettes that coats the lungs; causes lung
and other cancers

Tarsorrhaphy- a procedure in which the eyelids are sewn shut; performed to protect the corneas

Tartar- the hard deposit formed on teeth when mineral salts in saliva combine
with plaque; can cause dental problems such as gum disease if not controlled

Tay-Sachs disease- a severe genetic disorder that causes nervous system disturbances and death, usually before the age of 3

TB- see Tuberculosis

T cell- see T-lymphocyte

T-cell leukemia- a type of leukemia caused by a virus in which T-lymphocytes divide uncontrollably

Tear duct- a tiny passageway that drains lubricating tears from the surface of the eye to the back of the nose

Telangiectasia- redness of an area of skin, caused by enlargement and proliferation of the underlying small blood vessels

Temperature method- a natural method of family planning in which a woman determines her time of ovulation by changes in her daily temperature

Temporal arteritis- inflammation and narrowing of arteries in the head and neck, including those in the scalp near the temple, which can cause blindness if untreated

Temporomandibular joint syndrome- headache, facial pain, and jaw tenderness caused by irregularities in the way the joints, muscles, and ligaments in the jaw work together

Tendinitis- inflammation of a tendon, usually caused by injury, characterized by pain, tenderness, and sometimes limited movement in the attached muscle

Tendon- strong connective tissue cords that attach muscle to bone or muscle to muscle

Tendon transfer- surgical cutting and repositioning of a tendon so that the
muscle attached to it has a new function

Tennis elbow- a form of tendinitis that causes pain and tenderness in the elbow and forearm

Tenosynovitis- inflammation of the inner lining of the sheath that covers a tendon

Tenovaginitis- inflammation of the fibrous wall of the sheath that covers a tendon

TENS- see Transcutaneous electrical nerve stimulation

Tension headache- a headache caused by emotional strain or tension in the muscles of the head and neck

Teratogen- anything that causes abnormalities in a developing embryo or fetus, such as a drug or virus

Teratoma- a tumor composed of cells not normally found in the part of the body when the tumor occurred

Termination of pregnancy- see Abortion

Testicles- the two male sex organs that produce sperm and the sex hormone testosterone

Testicular feminization factor- a genetic disorder in which an individual who is genetically male has the external appearance of a female because the body is unresponsive to testosterone

Testicular torsion- severe pain and swelling of a testicle, due to twisting of the spermatic cord

Testosterone- the sex hormone that stimulates development of male sex characteristics and bone and muscle growth; produced by the testicles and in small amounts by the ovaries

Tetanus- a sometimes fatal disease affecting the brain and spinal cord; caused by infection with bacterium present in soil and manure

Tetracyclines- a group of antibiotic drugs used to treat a wide variety of infections, including bronchitis and some types of pneumonia

Tetralogy of Fallot- a genetic heart disease involving four structural defects in
the heart, which result in insufficient levels of oxygen in the blood

Thalamus- a structure in the brain that relays and processes incoming sensory information from the eyes and ears and from pressure and pain receptors

Thalassemia- a group of genetic blood disorders characterized by a defect in
the ability to produce hemoglobin, leading to the rupturing of red blood cells (called hemolytic anemia)

Thallium scanning- a type of radionuclide scanning used to assess the heart

Therapeutic range- the range of doses of a drug that will produce beneficial results without side effects

Thoracoscopy- examination of the membranes covering the lungs using an endoscope

Thoracotomy- a procedure in which the chest is surgically opened to operate on an organ in the chest cavity

Thorax- the chest

Thrill- a vibration felt when the hand is placed flat on the chest; caused by abnormal blood flow through the heart as a result of disease

Thrombectomy- removal of a blood clot

Thrombocytopenic purpura- a decrease in the number of platelets in the blood, causing abnormal bleeding of blood vessels into the skin

Thromboembolism- blockage of a blood vessel by a blood clot fragment that has broken off and traveled from another area of the body

Thrombophlebitis- inflammation of a vein, along with clot formation in the affected area

Thrombosis- a condition in which a blood clot (thrombus) has formed inside a blood vessel

Thrombus- a blood clot in a blood vessel

Thrush- a candidiasis infection

Thymoma- a tumor of the thymus gland

Thymus gland- an immune system gland located in the upper part of the chest
that plays an important role in the production of T-lymphocytes

Thyroglossal cyst- a swelling at the front of the neck; forms from a duct that f
ails to disappear during embryonic development

Thyroid gland- a gland located in the front of the neck below the voice box that plays an important role in metabolism (the chemical processes in the body) and growth; the gland produces thyroid hormone

Thyroiditis- inflammation of the thyroid gland

Thyrotoxicosis- a toxic condition resulting from overactivity of the thyroid gland

Thyroxin- a hormone produced by the thyroid gland that helps regulate energy production in the body

TIA- see Transient ischemic attack

Tibia- the thicker of the two long bones in the lower leg; commonly called the

Tic- an involuntary, repetitive movement such as a twitch

Tic douloureux- see Trigeminal neuralgia

Ticks- small, eight-legged animals that can attach to humans and animals and
feed on blood; sometimes spread infectious organisms via their bites

Tietze's syndrome- inflammation of the cartilage that joins ribs to the
breastbone, causing chest pain

Tinea- a group of common infections occurring on the skin, hair, and nails that
are caused by a fungus; commonly referred to as ringworm

Tinnitus- a persistent ringing or buzzing sound in the ear

Tipped uterus- an abnormal condition in which the uterus is tilted backward instead of slightly forward

Tissue plasminogen activator- a substance produced by the body and as a genetically engineered drug to prevent abnormal blood clotting

Tissue typing- tests used to determine the compatibility of tissues used in grafts and transplants

T-lymphocyte- a type of white blood cell that fights infections and destroys abnormal cells directly; as compared with releasing antibodies to fight infection

T-lymphocyte killer cell- a type of T-lymphocyte white blood cell that attaches to abnormal cells and releases chemicals that destroy them

TMJ syndrome- see Temporomandibular joint syndrome

Tolerance- decreased sensitivity of the body to a certain drug, usually either because the liver becomes more efficient at breaking down the drug or the body's tissues become less sensitive to it; increased tolerance creates a need for a higher dose of the drug in order to have the same effects

Tonometry- the procedure used to measure the pressure within the eye; is useful in detecting glaucoma

Tonsillectomy- surgical removal of the tonsils, usually to treat tonsillitis

Tonsillitis- infection and inflammation of the tonsils

Tonsils- masses of lymphoid tissue located at either side of the back of the throat

Tourette's syndrome- a movement disorder characterized by involuntary tics
and noises, and in some cases uncontrollable shouting of obscenities

Tourniquet- a device placed tightly around an arm or leg in order to stop blood flow; can be used to locate veins in order to take a blood sample or to control blood flow during some operations

Toxemia- the presence of bacterial toxins in the blood

Toxic epidermal necrolysis- a severe rash in which the outer layers of skin blister and peel off

Toxicity- the extent to which a substance is poisonous

Toxic shock syndrome- a life-threatening condition caused by a staphylococci toxin

Toxin- a poisonous substance

Toxocariasis- human infestation with the larvae of a worm found in the intestines of dogs

Toxoplasmosis- a common protozoan infection that is usually only dangerous to
a fetus in early pregnancy or a person who is immunocompromised

TPA- see Tissue plasminogen activator

Trachea- the tube running from the larynx (the voice box) down the neck and into the upper part of the chest, where it divides to form the two bronchi of the lungs; commonly called the windpipe

Tracheitis- inflammation of the trachea

Tracheotomy- insertion of a tube through a surgical opening in the trachea to maintain an open airway

Trachoma- a persistent, contagious form of conjunctivitis that can lead to complications such as blindness if untreated

Traction- the use of tension to hold a body part in place or to correct or prevent an alignment problem

Transcutaneous- through the skin

Transcutaneous electrical nerve stimulation- a method of relieving pain by applying tiny electrical impulses to nerve endings beneath the skin

Transferrin- a substance in the blood that transports iron throughout the body

Transient ischemic attack- a temporary block in the supply of blood to the brain, resulting in temporary loss of sensation, movement, vision, or speech; often called mini-strokes and can be precursors to a real stroke

Transmissible- able to be passed from one organism to another

Transplant- transferring a healthy tissue or organ to replace a damaged tissue or organ; also refers to the tissue or organ transplanted

Transurethral prostatectomy- removal of cancerous tissue from the prostate gland using a resectoscope (a long, narrow instrument passed up the urethra), which allows the surgeon to simultaneously view the prostate and cut away the cancerous tissue

Trauma- physical injury or emotional shock

Travelers' diarrhea- diarrhea when traveling in a foreign country, caused by contaminated food or water

Tremor- an involuntary, rhythmic, shaking movement caused by alternating contraction and relaxation of muscles; can be the normal result of age or the
abnormal effect of a disorder

Triage- a system used to classify sick or injured people according to the severity of their conditions

Trichiasis- growth of the eyelashes inward toward the cornea, causing persistent irritation of the eyeball

Trichinosis- infestation by the larvae of the parasitic worm Trichinella spiralis, usually acquired by eating undercooked pork

Trichomoniasis- infection of the vagina by the single-celled parasite Trichomonas vaginilis, which may cause inflammation, itchiness, and discharge from the vagina

Tricuspid valve- the valve located between the two left chambers of the heart (the left atrium and the left ventricle)

Tricyclic antidepressants- drugs used in the treatment of clinical depression

Trigeminal neuralgia- a disorder of the trigeminal nerve (a cranial nerve) that causes brief attacks of severe pain in the lips, cheeks, gums, or chin on one side of the face

Triglyceride- the main form of fat in the blood; determining levels of triglyceride is useful in diagnosing and treating diabetes, high blood pressure, and heart disease

Trimester- one of three periods lasting about 3 months each; the stages into which pregnancy is divided

Triple X syndrome- the presence of an extra X chromosome in a woman, which may cause some degree of mental retardation

Trismus- the medical term for lockjaw

Trisomy- the presence in the cells of three copies of a certain chromosome instead of the normal two copies

Trisomy 21- see Down syndrome

Tubal ligation- a procedure in which the fallopian tubes are cut and tied off; usually a permanent form of sterilization

Tubal pregnancy- a pregnancy that occurs in the fallopian tubes, with a fertilized egg implanting in the tube instead of the uterus; severely painful and can be fatal if not detected and treated

Tuberculin test- skin tests performed to determine previous infection with tuberculosis; can help rule out the possibility of being currently infected with tuberculosis

Tuberculosis- an infectious bacterial disease transmitted through the air that mainly affects the lungs

Tuberous sclerosis- a genetic disorder of the skin and nervous system characterized by epilepsy, mental retardation, and a skin condition resembling acne

Tuboplasty- surgical repair of a damaged fallopian tube to treat infertility

Tumor- an abnormal mass that occurs when cells in a certain area reproduce unchecked; can be cancerous (malignant) or noncancerous (benign)

Tunnel vision- loss of peripheral vision so that only objects directly ahead can
be seen; most commonly due to damage caused by increased pressure within the eye (glaucoma)

Turner's syndrome- a genetic disorder in women in which only one X chromosome is present, or both chromosomes are present but one is defective

Tympanic membrane- the medical term for the eardrum

Tympanoplasty- a surgical procedure used to treat hearing loss in which the eardrum or structures in the middle ear are repaired

Typhoid fever- an acute bacterial infection causing fever, headache, abdominal discomfort, and enlargement of the liver and spleen

Typhus- a group of diseases caused by the microorganism rickettsia, spread by the bites of fleas, mites, or ticks; symptoms include headache, fever, rash, and a
series of complications if untreated


© Donald Levy, MD. All Rights Reserved | Home | Insurance Coverage | Faq's | Background | Location | Sitemap |