Dermatitis, Atopic

**Definition:** A chronic inflammatory genetically determined disease of the skin marked by increased ability to form reagin (IgE), with increased susceptibility to allergic rhinitis and asthma, and hereditary disposition to a lowered threshold for pruritus. It is manifested by lichenification, excoriation, and crusting, mainly on the flexural surfaces of the elbow and knee. In infants it is known as infantile eczema.

**Tree numbers:** - C16.320.850.210 - C17.800.174.193 - C17.800.815.193 - C17.800.827.210 - C20.543.480.343

**Synonyms:** - Eczema, Atopic - Neurodermatitis, Atopic - Neurodermatitis, Disseminated