Targeted radiation therapy
A procedure that uses computers to create a 3-dimensional picture of the tumor in order to target the tumor as accurately as possible and give it the highest possible dose of radiation while sparing normal tissue as much as possible. It is also known as 3-D conformal (or conformational) radiation therapy.
Conventional radiation therapy directs x-rays not only at the tumor but also unavoidably at nearby healthy tissue. Targeted radiation is meant to deliver a higher dose of radiation to the cancer without causing so much damage to surrounding tissues.
Targeted radiation therapy is in use to treat prostate cancer and is under study with other types of cancer including lung cancer, brain tumors and cancer of the head and neck.
- Tarsal cyst
Also called a Meibomian cyst or a chalazion. A tarsal cyst is an inflammation of the oil gland of the eyelid.
- Tarsal tunnel syndrome
A type of compression neuropathy (nerve disease due to compression of the nerve) in the ankle and foot. Tarsal tunnel syndrome (TTS) is similar to the better-known carpal tunnel syndrome (CTS) caused by compression and irritation of the median nerve within the carpal tunnel, a bony canal in the palm side of the wrist that […]
The hardened product of minerals from saliva and foods that accumulates in plaque around the teeth. Dental plaque and tartar cause periodontal disease, including inflammation of the bone surrounding the teeth. Tartar can become as hard as rock, becoming removable only by a dentist or dental hygienist with special tools.
- Tassinari syndrome
A form of epilepsy associated with language difficulties. The syndrome surfaces around the age of four with receptive or expressive dysphasia and slowed learning. There may be absence, myoclonic, or focal seizures. The cause of the syndrome is unknown. Treatment is with seizure medications. The condition usually improves by adulthood. Also called CSWS (Continuous Spike […]
sweet, sour, bitter, and salty. In the mouth, these tastes, along with texture, temperature, and the sensations from the common chemical sense, combine with odors to produce the perception of flavor. Flavors are recognized mainly through the sense of smell. If a person holds his or her nose while eating chocolate, for example, the person […]