| sclerosis cutanea | Synonym: scleroderma. (05 Mar 2000) |
|---|---|
| sclerosis of white matter | <radiology> Type of dysmyelinating disease, hereditary, peripheral nervous system unaffected in some disorders Specific diseases: adrenoleukodystrophy, metachromatic leukodystrophy, spongy degeneration (Canavan), globoid cell (Krabbe) leukodystrophy, Alexander disease, Pelizaeus-Merzbacher disease, Cockayne syndrome (12 Dec 1998) |
| sclerosis, multiple | The National Multiple Sclerosis Society says of ms that it is a disease that randomly attacks your central nervous system, wearing away the control you have over your body. Symptoms may range from numbness to paralysis and blindness. The progress, severity and specific symptoms cannot be foreseen. You never know when attacks will occur, how long they will last, or how severe they will be. most people are diagnosed with ms between the ages of 20 and 40. In medical terms, ms involves demyelinization of the white matter sometimes extending into the gray matter. Demyelinization is loss of myelin, the coating of nerve fibres composed of lipids (fats) and protein that serves as insulation and permits efficient nerve fibre conduction. The white matter is the part of the brain which contains myelinated nerve fibres and appears white, whereas the gray matter is the cortex of the brain which contains nerve cell bodies and appears gray. When myelin is damaged in ms, nerve fibre conduction is faulty or absent. Impaired bodily functions or altered sensations associated with those demyelinated nerve fibres give rise to the symptoms of ms. Recent research (1998) has also identified nerve cell death as part of the nervous system injury in ms. (12 Dec 1998) |
| sclerostenosis | Induration and contraction of the tissues. Origin: sclero-+ G. Stenosis, a narrowing (05 Mar 2000) |
| Sclerostoma | A former generic name for strongyle (hookworm) nematodes and for trichostrongyle worms of horses; now replaced by other genera but still used as a collective term for this group. Species include Sclerostoma duodenale (Ancylostoma duodenale) and Sclerostoma syngamus (Syngamus trachea) [sclero-+ G. Stoma, mouth (05 Mar 2000) |
| sclerostomy | Surgical formation of an external opening in the sclera, primarily in the treatment of glaucoma. (12 Dec 1998) |
| sclerotherapy | A procedure which involves the injection of a sclerosing agent (causes scarring) into varicose veins in the extremities. Sclerotherapy may also be performed in the oesophagus, using UGI endoscopy, in the treatment of oesophageal varices in patients with cirrhosis of the liver. (27 Sep 1997) |
| sclerothrix | Induration and brittleness of the hair. Synonym: sclerotrichia. Origin: sclero-+ G. Thrix, hair (05 Mar 2000) |
| sclerotic | 1. Hard; firm; indurated; applied especially in anatomy to the firm outer coat of the eyeball, which is often cartilaginous and sometimes bony. 2. <anatomy> Of or pertaining to the sclerotic coat of the eye; sclerotical. 3. (Med) Affected with sclerosis; sclerosed. <botany> Sclerotic parenchyma, sclerenchyma. By some writers a distinction is made, sclerotic parenchyma being applied to tissue composed of cells with the walls hardened but not thickened, and sclerenchyma to tissue composed of cells with the walls both hardened and thickened. Origin: Gr. Hard: cf. F. Sclerotique. <anatomy> The sclerotic coat of the eye. Origin: Cf. F. Sclerotique. <chemistry> Pertaining to, or designating, an acid obtained from ergot or the sclerotium of a fungus growing on rye. Source: Websters Dictionary (01 Mar 1998) |
| sclerotic bodies | Vegetative rounded muriform cells of dematiaceous fungi, characteristic of the causal agents of chromoblastomycosis in tissue. Synonym: copper pennies. (05 Mar 2000) |
| sclerotic bone metastases | <radiology> Prostate, bladder, rectum, breast (occasionally), bronchus, carcinoid tumours, Hodgkin disease, stomach see: ivory vertebral body (12 Dec 1998) |
| sclerotic cemental mass | Benign fibro-osseous jaw lesions of unknown aetiology, occurring predominantly in middle-aged black females, which present as large painless radiopaque masses usually involving several quadrants of the jaw. Synonym: florid osseous dysplasia, cemental dysplasia. (05 Mar 2000) |
| sclerotic coat | <anatomy> The tough white outer coat of the eyeball, covering approximately the posterior five sixths of its surface and continuous anteriorly with the cornea and posteriorly with the external sheath of the optic nerve. Origin: L., Gr. Skleros = hard (18 Nov 1997) |
| sclerotic dentin | Dentin characterised by calcification of the dentinal tubules as a result of injury or normal aging. Synonym: transparent dentin. (05 Mar 2000) |
| sclerotic gastritis | A fibrous thickening of the walls of the stomach with diminution in the capacity of the organ. (05 Mar 2000) |