TY - CHAP M1 - Book, Section TI - Atopic Dermatitis A1 - Hardin, J. Matthew A2 - Knoop, Kevin J. A2 - Stack, Lawrence B. A2 - Storrow, Alan B. A2 - Thurman, R. Jason PY - 2021 T2 - The Atlas of Emergency Medicine, 5e AB - Atopic dermatitis presents in three overlapping stages: infantile, childhood, and adult. Infantile begins after 2 months of age and is symmetrically distributed on the cheeks, scalp, neck, forehead, and extensor surfaces of the extremities. The lesions begin as erythema or papules, but with persistent itching and rubbing, they become thin plaques, exudative, and crusted. Childhood atopic dermatitis presents with flexural involvement. Other areas frequently involved are the face, neck, and trunk. The scratching induces plaque lichenification and potential for secondary infection. Adult atopic dermatitis is less specific but can present with a childhood-like distribution, papular lesions that coalesce into plaques, and chronic hand dermatitis. Uncontrolled atopic dermatitis can become a generalized exfoliative erythroderma. Differential diagnoses include seborrheic dermatitis, psoriasis, irritant or allergic contact dermatitis, nummular eczema, and scabies. SN - PB - McGraw-Hill CY - New York, NY Y2 - 2024/11/08 UR - accessemergencymedicine.mhmedical.com/content.aspx?aid=1181044032 ER -