<prompt> Infantile atopic dermatitis commonly involvesFlexorsExtensorsHead neckPerianal area  <response>: Infantile atopic dermatitis 2 months - 2 years: More commonly involves extensors.Childhood atopic dermatitis 2 - 10 years: Commonly involves flexorsAdolescent atopic dermatitis 10 years: Commonly involves flexors, hand feet. 