Pathophysiology of psoriasis is an important feature into the proliferation of basal keratinocytes significantly increased the pool than normal, and the accelerated proliferation of filamentous division cycle shortened from the normal 311 hours to 37.5 hours. Epidermal transit time from 28-56 days shortened to 3-4 days, due to excessive keratinocytes through the skin, making it too late to fully mature, histologically there parakeratosis, granular layer disappears.

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