More common in youth & middle aged people Male>Female City>countryside North>South White race>yellow race>black race
Aetiology and Pathogenesis
Genetic factors: polygenic disease related HLA---A1,B13,B17,Cw6,etc
Environmental factors: infection, trauma (both mentally and physically), drug Immune factors: abnormal activation of T cells
with cytokines releasing (IL-1,IL-6,IL-8,TNF-a)
Auspitz sign
Psoriasis guttata
Psoriasis nummularis
Psoriasis annulata
Psoriasis rupioides
Psoriasis hypertrophica
Psoriasis zosteriformis
Psoriasis geographica
X-ray of psoriasis arthropathica
Osteoporosis Stenosis of joint
cavity Erosion of the joint
Psoriasis pustulosa localized generalized
Localized psoriasis pustulosa
Psoriasis