Salivary gland tumors are growths of cells that start in the salivary glands. Salivary gland tumors are rare. The salivary glands make saliva. Saliva aids in digestion, keeps the mouth moist and supports healthy teeth. There are three pairs of major salivary glands under and behind the jaw. These are the parotid, sublingual and submandibular glands. Many other tiny salivary …

Tuberous sclerosis complex (TSC) is a rare genetic disease that causes noncancerous tumors to grow throughout your body. This condition, sometimes known simply as tuberous sclerosis, can affect people in many ways. People with less severe cases may see very few effects and have a normal lifespan. Severe cases can lead to serious complications. TSC is a disease that may …

Truncus arteriosus (TRUN-kus are-teer-e-OH-sus) is a congenital heart defect (heart condition that’s present at birth). A baby with truncus arteriosus has one large artery (instead of the usual two arteries) for blood to flow in and out of the heart. These babies also have a single truncal valve instead of two valves to control this blood flow. Truncus arteriosus is a life-threatening …

Trigger finger is a condition that makes your fingers or thumb difficult to move. It can “freeze” them in a flexed position. It affects the tendons in your fingers and thumbs. Trigger finger gets its name from the position your fingers can get stuck in — it looks like you’re trying to pull an invisible trigger. If you have trigger …

Tricuspid valve regurgitation is when the “door” connecting the upper and lower chambers on the right side of your heart doesn’t properly close. This leaky door allows some blood to flow backward each time your heart beats. Tricuspid valve regurgitation is a form of heart valve disease. It can range from trivial (no effects on your body) to severe. Over time, moderate to severe backward …

Tricuspid valve disease is a condition that occurs when the valve between the two right heart chambers doesn’t function properly. The tricuspid valve is one of four heart valves that help blood flow in the right direction. The tricuspid valve is between the right upper heart chamber (atrium) and the right lower heart chamber (ventricle). Blood flows from the right …

Tricuspid atresia is a congenital (present at birth) heart defect that occurs when the tricuspid valve of the heart doesn’t form. The tricuspid valve is normally between two chambers on the right side of your heart, the right atrium (upper chamber) and right ventricle (lower chamber). In tricuspid atresia, you have solid tissue instead of the tricuspid valve. This sheet of tissue blocks …

Trichomoniasis or “trich” is a common and curable sexually transmitted infection (STI). Trich spreads during sexual intercourse — in semen (cum) and vaginal fluids. Its name comes from the parasite Trichomonas vaginalis, which causes the infection. You may have trich and not know it — most people don’t have symptoms from the infection. Trich is contagious, which means you might unknowingly infect others through …

Trichinellosis, more commonly known as trichinosis, is a parasitic food-borne disease that is caused by eating raw or undercooked meats, particularly pork products infested with the larvae of a type of roundworm called Trichinella. When you eat food, your stomach acid and enzymes digest what you eat. In the case of infected meat, the acid and enzymes break down the hard …

Transverse myelitis (TM) is a rare neurological condition caused by inflammation of your spinal cord. Your spinal cord is a cylindrical structure that runs through the center of your spine, from your brainstem to your low back. It’s a delicate structure that contains nerve bundles and cells that carry messages from your brain to the rest of your body. Due to inflammation, the covering (myelin sheath) …