| linear amputation | Amputation performed by a circular incision through the skin, the muscles being similarly divided higher up, and the bone higher still. Synonym: guillotine amputation, linear amputation. (05 Mar 2000) |
|---|---|
| linear atrophy | Bands of thin wrinkled skin, initially red but becoming purple and white, which occur commonly on the abdomen, buttocks, and thighs at puberty and/or during and following pregnancy, and result from atrophy of the dermis and overextension of the skin; also associated with ascites and Cushing's syndrome. Synonym: atrophoderma striatum, lineae albicantes, lineae atrophicae, linear atrophy, stretch marks, stria, striae atrophicae, striate atrophy of skin, traction atrophy, vergeture. (05 Mar 2000) |
| linear dichroism | <chemistry> Differential absorption of right hand and left hand circularly polarized light resulting from molecular asymmetry involving a chromophore group. Circular dichroism is used to study the conformation of proteins in solution. (18 Nov 1997) |
| linear energy transfer | <radiobiology> Average amount of energy lost per unit of particle track length and expressed in keV um-1. Acronym: LET (16 Dec 1997) |
| linear epidermal nevus | A congenital systematised linear nevus limited to one side of the body or to portions of the extremities on one side; lesions are often extensive, forming wave-like bands on the trunk and spiraling streaks on the extremities. Synonym: linear epidermal nevus. (05 Mar 2000) |
| linear fracture | A fracture running parallel with the long axis of the bone. Synonym: fissured fracture. (05 Mar 2000) |
| linear models | Statistical models in which the value of a parameter for a given value of a factor is assumed to be equal to a + bx, where a and b are constants. The models predict a linear regression. (12 Dec 1998) |
| linear skull fracture | A skull fracture resembling a line. (05 Mar 2000) |
| bullous | <pathology> Pertaining to or characterised by bullae. (18 Nov 1997) |
| bullous congenital ichthyosiform erythroderma | Diffusely red, eroded skin at birth, with subsequent scaling, tending to improve in later life, characterised by generalised epidermolytic hyperkeratosis and autosomal dominant inheritance. See: epidermolytic hyperkeratosis. Synonym: generalised epidermolytic hyperkeratosis, ichthyismus hystrix, ichthyosis hystrix. (05 Mar 2000) |
| bullous diseases of oesophagus | <radiology> Epidermolysis bullosa dystrophica, autosomal recessive, presents in infancy or later life, epidermal-dermal separation, with or without anal strictures, Treatment: conservative, soft diet, benign mucous membrane (cicatricial) pemphigoid, not pemphigus vulgaris, not bullous pemphigoid, females (2:1), elderly (12 Dec 1998) |
| bullous emphysema | Emphysema in which the enlarged airspaces are one to several cm in diameter, often visible on chest radiographs. Thin-walled air sacs under tension compress pulmonary tissue, either single or multiple. Sometimes amenable to surgical resection with improvement in pulmonary function. (05 Mar 2000) |
| bullous fever | An obsolete term for a pyogenic infection due to local trauma, that responds to antibiotic therapy; if untreated, the condition may become extensive and the patient seriously ill. Synonym: bullous fever. (05 Mar 2000) |
| bullous impetigo of newborn | Usually, widely disseminated bullous lesions appearing soon after birth, caused by infection with Staphylococcus aureus. Synonym: impetigo neonatorum, pemphigus gangrenosus. (05 Mar 2000) |
| bullous keratopathy | Oedema of the corneal stroma and epithelium; occurs in Fuchs' epithelial dystrophy, advanced glaucoma and iridocyclitis, and sometimes after intraocular lens implantation. (05 Mar 2000) |