[Management of atopic dermatitis: practical guidelines suggested by the conclusion of systematic assessment in 500 children].

Allergic management of AD may be worthwhile since allergy may trigger the disease. A systematic evaluation of sensitizations overtime and study of their clinical involvement in 500 children with AD was carried out, including minor, moderate, and severe patients (defined by clinical scores). Standardized methods assessed the possibility of contact dermatitis as well as IgE dependant allergies. Contact dermatitis concerned fragrances and nickel. Contact dermatitis was observed in minor and moderate AD with a progressive increase: 11% of children under 2 years and 58% in those over 15 years of age. Later in older children, sensitization to cosmetics and occupational allergens occurred in close connection with the specific environment. As for IgE sensitization, investigation should be electived advised in moderate and severe AD. Inhalant allergen sensitization was observed in 66% in moderate AD and 93% in severe AD in the group of 7 or 15 years. Clinical confrontation was a better indicator of cutaneous involvement than atopen patch-test. It mainly concerned respiratory symptoms. In severe AD, food allergy was constantly observed and presented as a marker for severe atopic dermatitis. The main trophallergen differ according to the age and cultural habits: in children under 2 years of age, eggs, peanuts, milk, fish were the main offending agents. Later, main trophallergens were wheat flour, shellfish. Although spontaneous decrease of food allergy is sometimes observed, it must be pointed out that food allergy may still persist as a triggering factor in teenagers as well as in adult-hood. The allergologic diagnosis of atopic dermatitis should not focus on IgE dependent sensitization without patch testing.