| LPF | leukocytosis-promoting factor; leukopenia factor; lipopolysaccharide factor; localized plaque format... |
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| PFC | pair-fed control [mice]; patient-focused care; pelvic flexion contracture; perfluorocarbon; pericard... |
| PFU | plaque-forming unit; pock-forming unit |
| PI | first meiotic prophase; isoelectric point; pacing impulse; package insert; pancreatic insufficiency;... |
| PN | papillary necrosis; parenteral nutrition; penicillin; perceived noise; percussion note; periarteriti... |
| dental plaque | <dentistry> A soft, thin film of food debris, mucin and dead epithelial cells deposited on the teeth, providing the medium for the growth of various bacteria. The main inorganic components are calcium and phosphorus with small amounts of magnesium, potassium and sodium, the organic matrix consists of polysaccharides, proteins, carbohydrates, lipids and other components. Plaque plays an important aetiological role in the development of dental caries and periodontal and gingival diseases and provides the base for the development of materia alba, calcified plaque forms dental calculus. (19 Mar 1998) |
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| dental plaque index | An index which scores the degree of dental plaque accumulation. (12 Dec 1998) |
| fibrous plaque | Thickened area of arterial intima with accumulation of smooth muscle cells and fibrous tissue (collagen etc.) produced by the fat laden smooth muscle cells. Below the thickening may be free extracellular lipid and debris that, if much necrosis is also present, is referred to as an atheroma. (18 Nov 1997) |
| generalised pustular psoriasis of Zambusch | An extensive exacerbation of psoriasis, with pustule formation in the normal and psoriatic skin, fever, and granulocytosis; sometimes precipitated by oral steroids. Synonym: generalised pustular psoriasis of Zambusch. A local pustular eruption of the palms and soles, occurring most commonly in a patient with psoriasis; difficult to distinguish from acrodermatitis continua. (05 Mar 2000) |
| psoriasis | <dermatology> A common chronic, squamous dermatosis, marked by exacerbations and remissions and having a polygenic inheritance pattern. The most distinctive histological findings in well developed psoriasis are Munro microabscesses and spongiform pustules. It is characterised clinically by the presence of rounded, circumscribed, erythematous, dry scaling patches of various sizes, covered by greyish white or silvery white, umbilicated and lamellar scales, which have a predilection for the extensor surfaces, nails, scalp, genitalia and lumbosacral region. Central clearing and coalescence of the lesions produce a wide variety of clinical configurations, including annular or circinate, discoid or nummular, figurate and gyrate arrangements. Origin: Gr. Psoriasis (18 Nov 1997) |
| psoriasis annularis | Psoriasis in which healing is taking place at the centre of the lesion while the process continues at the periphery, producing a ring-shaped or annular lesion. Synonym: psoriasis annularis, psoriasis annulata, psoriasis orbicularis. (05 Mar 2000) |
| psoriasis arthropica | Psoriasis associated with severe arthritis resembling rheumatoid arthritis, although serum rheumatoid factor is absent. (05 Mar 2000) |
| psoriasis circinata | Psoriasis in which healing is taking place at the centre of the lesion while the process continues at the periphery, producing a ring-shaped or annular lesion. Synonym: psoriasis annularis, psoriasis annulata, psoriasis orbicularis. (05 Mar 2000) |
| psoriasis diffusa | Diffused psoriasis, a form of psoriasis with extensive coalescence of the lesions. (05 Mar 2000) |
| psoriasis discoidea | Psoriasis in which the lesions are discrete and disklike. Synonym: psoriasis nummularis. (05 Mar 2000) |
| psoriasis geographica | Psoriasis gyrata in which the lesions suggest the coast outline on a map. (05 Mar 2000) |
| psoriasis guttata | Psoriasis occurring abruptly in round patches of small size; seen in young persons following streptococcal infections. (05 Mar 2000) |
| psoriasis gyrata | Psoriasis circinata in which there is a coalescence of the rings giving rise to figures of various outlines. (05 Mar 2000) |
| psoriasis inveterata | Psoriasis in which the lesions are confluent, the affected skin being thickened, indurated, and scaly. (05 Mar 2000) |
| psoriasis nummularis | Psoriasis in which the lesions are discrete and disklike. Synonym: psoriasis nummularis. (05 Mar 2000) |