Classification Psoriasis

1 classification

1.1 morphological
1.2 pathogenetic
1.3 severity

classification
morphological

psoriasis classified papulosquamous disorder , commonly subdivided different categories based on histological characteristics. variants include plaque, pustular, guttate, , flexural psoriasis. each form has dedicated icd-10 code. psoriasis can classified nonpustular , pustular types.

pathogenetic

another classification scheme considers genetic , demographic factors. type 1 has positive family history, starts before age of 40, , associated human leukocyte antigen, hla-cw6. conversely, type 2 not show family history, presents after age 40, , not associated hla-cw6. type 1 accounts 75% of persons psoriasis.

the classification of psoriasis autoimmune disease has sparked considerable debate. researchers have proposed differing descriptions of psoriasis , psoriatic arthritis; authors have classified them autoimmune diseases while others have classified them distinct autoimmune diseases , referred them immune-mediated inflammatory diseases.

severity

distribution of severity

there no consensus how classify severity of psoriasis. mild psoriasis has been defined percentage of body surface area (bsa)≤10, psoriasis area severity index (pasi) score ≤10, , dermatology life quality index (dlqi) score ≤10. moderate severe psoriasis defined same group bsa >10 or pasi score >10 , dlqi score >10. dlqi 10 question tool used measure impact of several dermatologic diseases on daily functioning. dlqi score ranges 0 (minimal impairment) 30 (maximal impairment) , calculated each answer being assigned 0–3 points higher scores indicating greater social or occupational impairment.

the psoriasis area severity index (pasi) used measurement tool psoriasis. pasi assesses severity of lesions , area affected , combines these 2 factors single score 0 (no disease) 72 (maximal disease). nevertheless, pasi can unwieldy use outside of research settings, has led attempts simplify index clinical use.