الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Psoriasis is a common, chronic, inflammatory skin disease affecting 2-3% of people worldwide of immune origin. The important clinical hallmarks are: erythema, thickening and scaling. The plaque type of psoriasis is the most common type so this research is focusing on this type.
Narrow-band ultraviolet B phototherapy utilizes ultraviolet radiation in the specific wavelength range of 311–312 nm and is an important treatment modality to reduce the skin manifestation of the disease.
An insufficient antioxidant system has been suggested in the pathogenesis of psoriasis.The most important enzymes active in the antioxidant system are SOD, GP and CAT .They are used to determine the response of treatment by comparing their blood serum levels using ELISA technique before and after exposure to phototherapy and calculating the change to assess their value as bio assessment tools of the disease progression and response to therapy whatever the modality used.