Psoriasis can start at almost any age and involves both the sexes equally. It manifests in a variety of forms.
The most frequent manifestation is called plaque type psoriasis where the lesions characteristically consist of well demarcated erythematous plaques covered with loosely adherent silvery scales, the silvery colour of the scales becoming more prominent when attempts are made to scrape them off.
The lesions vary in shape and size and with peripheral extension some lesions may coalesce to form large gyrate or geographical patterns. Extensor aspects of the extremities, particularly the elbows and the knees, the sacral region of the back and the scalp are the usual sites. Scalp involvement is rare in children. [Read more...]