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Lesion
Lesion Injury of bodily tissue due to infection, trauma or neoplasm
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Injury
Injury is damage or harm caused to the structure or function of the body caused by an outside agent or force, which may be physical or chemical.
Tissue
Biological tissue is a group of cells that perform a similar function.The study of tissues is known as histology, or, in connection with disease, histopathology.The classical tools for studying the tissues are the wax block, the tissue stain, and the optical microscope, though developments in electron microscopy, immunofluorescence, and frozen sections have all added to the sum of knowledge in the last couple of decades.
Infection
Anything that invades the body and reproduces. Infections can be bacteria, protozoa, fungi, or viruses. Bacteria and fungi are one celled creatures that cause many infections including strep throat, bladder infections, and some lung infections. Fungi cause “athlete’s foot” and thrush, an infection in the mouth. Protozoa are small organisms with many cells that can cause infections in the guts or in the lungs. Most healthy people do not get protozoal infections, but people with suppressed immune systems can. Viruses are not really organisms; they are tiny particles that can live only inside another cell. They reproduce by taking over a cell and causing that cell to make more virus particles, rather than doing what the cell is supposed to do. Viruses cause most colds and flu cases.
Trauma
Injury caused by external force, chemical, temperature extremes, or poor tooth alignment.
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Levodopa
L-dopa. The single most effective anti-Parkinson drug, it is changed into dopamine in the brain.
Lewy body
A pink-staining sphere, found in the bodies of dying cells, that is considered to be a marker for Parkinson's disease.
Lordosis
An exaggeration of the forward curve of the lower part of the back, sometimes called sway-back.
Laminate
Thin plastic or porcelain veneer produced in a dental laboratory and then bonded to a tooth.
Laughing gas
Nitrous oxide; odorless inhalation agent that produces relative analgesic (sedation); reduces anxiety and creates a state of relaxation.
Lesion
Local anesthesia
Partial or complete elimination of pain sensation, in the immediate vicinity of its application or injection.
Laminectomy
Operation to remove prolapsed disc - involves removal of part of a vertebra.
Lasegue sign
Pain in the back of the leg on flexing a patient's hip and knee and then extending the knee while the hip is flexed. Results from dural irritation, usually by a prolapsed disc.
Lesch-Nyhan syndrome
Results from congenital deficiency of hypoxanthine guanine phosphoribosyl transferase (HGPRT) - resulting in hyperuricaemia. Causes gout (even in a baby), mental retardation and choreoathetosis.
Letterer-Siwe Disease
A form of Histiocytosis-X
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