| psoriasiform | Resembling psoriasis. (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) |
| psoriasis orbicularis | 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 ostreacea | Psoriasis with concentric tiers of scales which give the appearance of the layering of an oyster shell. Synonym: psoriasis rupioides. (05 Mar 2000) |
| psoriasis punctata | Psoriasis in which the individual lesions are papules, each red in colour, and tipped with a single white scale. (05 Mar 2000) |