Diseases & conditions A-Z List
Diseases & Conditions A-Z List - «T»:
Trichomoniasis is a sexually transmitted disease caused by the parasite Trichomonas vaginalis.
Trichomoniasis is found worldwide. In the United States, the highest number of cases are seen in women between age 16 and 35. Trichomonas vaginalis is spread through penis-to-vagina intercourse or...
Trichorrhexis nodosa is a problem in which thickened or weak points (nodes) along the hair shaft cause your hair to break off easily.
Your genes may play a role in whether or not you develop trichorrhexis nodosa.
Certain things you do to your hair -- such as blow-drying, over-brushing, perm...
Trichotillomania is hair loss from compulsive pulling or twisting of the hair until it breaks off.
Trichotillomania is a type of compulsive behavior. Its causes are not clearly understood.
It may affect as much as 4% of the population. Women are four times more likely to be affected than men...
Tricuspid atresia is a type of congenital heart disease in which the tricuspid heart valve is missing or abnormally developed. The defect blocks blood flow from the right atrium to the right ventricle.
Tricuspid atresia is an uncommon form of congenital heart disease that affects about 5 in ...
Tricuspid regurgitation is a disorder in which the heart's tricuspid valve does not close properly, causing blood to flow backward (leak) into the right upper heart chamber (atrium) when the right lower heart chamber (ventricle) contracts.
The tricuspid valve separates the right lower heart ...
Trigeminal neuralgia is a nerve disorder that causes a stabbing or electric-shock-like pain in parts of the face.
The pain of trigeminal neuralgia comes from the trigeminal nerve. This nerve carries pain, feeling, and other sensations from the brain to the skin of the face. It can affect par...
The triglyceride level is a laboratory test to measure the amount of triglycerides in your blood. Triglycerides are a type of fat.
Your body makes some triglycerides. Triglycerides also come from the food you eat. When you eat, your body uses carbohydrate calories for immediate energy. Leftover calo...
Trisomy 13 (also called Patau syndrome) is a genetic disorder in which a person has three copies of genetic material from chromosome 13, instead of the usual two copies. Rarely, the extra material may be attached to another chromosome (translocation).
Trisomy 13 occurs when extra DNA from ch...
Trisomy 18 is a genetic disorder in which a person has a third copy of genetic material from chromosome 18, instead of the usual two copies.
Trisomy 18 is a relatively common syndrome. It is three times more common in girls than boys. The syndrome is caused by the presence of extra material ...
Tropical sprue is a condition seen in residents of, or visitors to tropical areas. It impairs the absorption of nutrients from the intestines, causing malabsorption.
See also: Celiac disease - sprue
The cause of this disease is swelling (inflammation) of the small intestine due to excess le...
The troponin test measures the levels of one of two proteins, troponin T or troponin I, in a blood sample. These proteins are released when the heart muscle has been damaged, such as during a heart attack. The more damage there is to the heart, the greater the amount of troponin T and I there will b...
Truncus arteriosus is a rare type of congenital heart disease in which a single blood vessel (truncus arteriosus) comes out of the right and left ventricles, instead of the normal two (pulmonary artery and aorta).
There are different types of truncus arteriosus, depending on the anatomy of the singl...
Trypsin and chymotrypsin in stool
Trypsin and chymotrypsin are substances released from the pancreas during normal digestion. When the pancreas does not produce enough trypsin and chymotrypsin, smaller-than-normal amounts can be seen in a stool sample.
This article discusses the test to look for trypsin and chymotrypsin in stool.
Trypsinogen is a substance normally produced in the pancreas. Trypsinogen moves from the pancreas to the small intestine. However, some diseases can interrupt this process.
A test can be done to measure the amount of trypsinogen in your blood.
How the Test is Performed
Blood is drawn from a vein, u...
Tryptophan is an amino acid needed for normal growth in infants and for nitrogen balance in adults. It is an essential amino acid, which means your body cannot produce it -- you must get it from your diet.
The body uses tryptophan to help make niacin and serotonin. Serotonin is thought ...