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The article presents an encyclopedia entry for erythroderma. It is an exfoliative dermatitis, characterized by diffusely inflamed red skin with varying degrees of scaling. It can be induced by various agents including drugs. Drug eruptions that appear as morbiliform can develop into erythroderma over time.

A definition of the term "eczema herpeticum" is presented. It refers to an acute and disseminating infection with herpex simplex virus. Patients with underlying immunosuppression or with severe atopic dermatitis can be affected by the disease.

A definition of the term atopic dermatitis is presented. It is referred to as a chronic inflammatory disorder of the skin with a genetic disposition. Patients of this disease experience severe pruritus and clinically acute, lichenified eczematous lesions.